Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61e9c0fee26936e…

MALICIOUS

PDF

53.6 KB Created: 2020-10-27 17:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 24d05e77340f76487c16d838596e059f SHA-1: 37deb29bfa73b1aec05ae63b106b84aae5c766f0 SHA-256: a61e9c0fee26936eb5806f43d6828d316a1ac50b43df8db281fca376d1c88a80
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains multiple heuristics indicating malicious redirector links and a link farm. The document body, though partially corrupted, contains a title that appears to be a lure for a 'beam program teacher recommendation form'. The embedded links, particularly those pointing to 'ggtraff.ru', are identified as malicious redirectors, suggesting an attempt to lead users to phishing or malware hosting sites. The presence of numerous PDF links further supports a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?keyword=beam+program+teacher+recommendation+form+2018 In PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/268e39ae.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/2821895.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/lebugodoj_xufadijemorov_davubesezon_koravisawonub.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/9836671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f8c8c0c4a306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f94592ec4a76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f880aca59b8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f874f9d289fc.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06cda628-6f1f-4ceb-bdcf-0dceae0efa6a/caracter_multietnico_pluricultural_s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad551c18-b1e0-482f-90cf-51c5f9118b40/37140968876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434ed0d5-93ef-471f-bad2-0a7809149043/pajatalogori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b1fe77-14db-44e9-84b5-98e5d6be0a48/35974520806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4667/2805/files/mevaposukizofijuzexozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4693/5969/files/74069326744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8535/files/fabotefirawedawebejasevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8783/4525/files/wu_tang_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08b4c8c-1788-4f9e-944c-e9187231b2cd/72362860884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/770bab1e-f389-40e1-9a2d-4c7eb44f6af3/xbox_one_jailbreak_free_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228dca94-44b6-4fa0-80fb-13b19495e8fa/53980542673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55c2e21-87c4-46d9-990b-fd9068ddb911/77107303401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b80f785e-b16f-4a10-b5ba-aa57223de46e/4665887230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/capello_star_clock_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0167/4435/files/the_leaf_cafe_bannockburn_il.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7846/5730/files/1633277795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8789/5969/files/how_to_move_contacts_on_android.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000801e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x801E 13900 bytes
SHA-256: 777a3167c8b34e856f856aaa10aec0a3591fbac9619303840f615cd68143381c
font_00_sfnt_off00006c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C18 5928 bytes
SHA-256: 55deb4b2ef12a11da6cf94663e3d9cb5efb9b40194cc821d750223422296cac7
font_02_sfnt_off0000a5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5EA 10020 bytes
SHA-256: e459c276c690c3640ab9c40749795eebdede4586b26d2f812b4b738736f9ace1

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