Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b3859eaa9f8fe0…

MALICIOUS

PDF

44.1 KB Created: 2020-10-18 06:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 87b88da3ecbba411e7342e98b1d0298a SHA-1: c53319c490cee9eb069b71a3d12bc160e21264f9 SHA-256: a4b3859eaa9f8fe0089c8c6a0ddf4c23b47da8337054424e61e197512778514c
194 Risk Score

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://ttraff.me/123?keyword=coleman+power+steel+pool+owners+manual In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/4106527.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/sizupezezalimubaripi.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • https://nosekuge.weebly.com/uploads/1/3/2/7/132740467/selisezinijizif.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/5669539.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/lupefesosite-rofakewawi-nanoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8ba0fe21533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5f8a1fa28d580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f871b96b10c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0055/1365/files/66027830373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/scratch_pad_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0800/6565/files/rosemarie_tong_feminist_thought.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/lekefuxetupedin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0980/1880/files/79885731984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605c89e5-b036-4f99-aaa7-d7e822192d72/49289018924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee8f4e89-2b2e-4fcb-b4e5-619036a26935/78935650965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24112ba1-7261-4a24-b9c7-d5143965e003/30571882204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9861ef5-3d83-41fe-a70a-c2394078153e/jaludotewojoniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d108591f-8528-4ed7-b08f-1a18671b1299/34322679356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a51de8-a749-400f-bf3a-e6d2a69f694b/tozogisapanewosogesagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c18e693-c289-45e6-bf71-b20521b13402/vojevikevimuduzozepevara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab48647-b746-475b-86a2-20a4a7a6ee3b/xijabafatemotipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6391f5c-1b4d-4a41-bb10-ad256b53c20f/31915080018.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B6 4760 bytes
SHA-256: 70adae7d5800168e6ee7e40895ed3874de7acdeda4a3903147e36a15dc4fb29d
font_01_sfnt_off0000662b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662B 4964 bytes
SHA-256: a946d1b23489faabf47058ae4a230a97d79ffd8a1c1b31e77810a743d4192bf5
font_02_sfnt_off000076ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FF 14136 bytes
SHA-256: 79e7d25a4edce45bb2a29d0026fa13dc72a552f941a66eff098b3e4a51b9071a