Malicious PDF — malware analysis report

Static analysis result for SHA-256 4455caca60d99bb3…

MALICIOUS

PDF

48.7 KB Created: 2020-10-10 00:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 389d4b46a2e67a4fd98db69cd0a0cb85 SHA-1: 6664c8e8a59770912a4616f8036f0b9e6171775e SHA-256: 4455caca60d99bb35fad60eeb2a72aa61239c2097cc25ab38417400197724755
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cctraff.ru/strik?keyword=save+the+sheriff In PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/jevimabisudarofamirube.pdfIn PDF document text
    • https://site-1037899.mozfiles.com/files/1037899/38501773107.pdfIn PDF document text
    • https://site-1043123.mozfiles.com/files/1043123/dagesitawuzegujaxetaridu.pdfIn PDF document text
    • http://files.savannah-aerials.co.za/uploads/1/3/2/6/132682822/vafenelufemowe-norimemuzitim.pdfIn PDF document text
    • http://files.daovanhoang.com/uploads/1/3/1/3/131381166/c7a8bea24d.pdfIn PDF document text
    • http://files.nelsoneyewear.com/uploads/1/3/1/3/131384055/3799353.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/nefitiruwufezopalotexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1064/4377/files/zijafuvuzumogozosubukibof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9436/0735/files/map_of_central_asia_and_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/nuboxawuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/killing_mr._griffin_full_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4739/4714/files/vuxutonafopalaribaxusis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5940/4191/files/video_recording_glasses_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/matemikidugutinozowibit.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

Related samples 8

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
font_00_sfnt_off00007534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7534 4560 bytes
SHA-256: 8ee7c82b22afae5ca93504042508a9679122ea2d198db72c8e13ed68edf2d198
font_01_sfnt_off000084b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B8 10352 bytes
SHA-256: 31d4cd5a49d2c270bff05d8dd6d4562508d98de08069eb5b54afe75581d45ac8
font_02_sfnt_off0000a819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA819 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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