Malicious PDF — malware analysis report

Static analysis result for SHA-256 031e0684a6b51978…

MALICIOUS

PDF

44.0 KB Created: 2020-09-10 09:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1b1c54a47be710a68d920920d8f824e SHA-1: ef60efbcf0b62d6f0dd4979c92b24620ade2e358 SHA-256: 031e0684a6b51978a7cbcf91ebce4c9e5eb16a2a11ff965779c80ccfbedd166a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a known malicious redirector, which is part of a link farm designed to distribute malicious content. The ML classifier strongly indicated maliciousness, and the presence of multiple external links suggests an attempt to drive traffic to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.link/pify?keyword=06+mustang+gt+auto+to+manual+swap In PDF document text
    • http://lemevi.freebackgroundphotos.com/uploads/1/3/1/4/131407668/820924.pdfIn PDF document text
    • http://wafirevot.fiveboroughbucketlist.com/uploads/1/3/2/8/132814742/1376973.pdfIn PDF document text
    • http://fuzobufes.timsteigenga.com/uploads/1/3/1/3/131398455/7591684.pdfIn PDF document text
    • http://files.rcgswi.org/uploads/1/3/0/7/130738534/ddbd02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_09965cc0bac748d0a6ba1edf743a910a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4bb894_0397f7a8ff944580b65f09cb4005e16d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/aff7ca_6c2db8709a55419391322ed9ab4b083c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d1c05f_8af45caacbf144278b1dcaf3dc126f20.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/76aeb6_b272e88c09a34320a8b00485429095cc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3b108d09a0114a81aec1da4e4a13d027.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/22739b_6652fb0253a044b08217aed4bd0afeab.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/01d500_9f5f1239bcca4d7585a3f23a2c87d9a5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d31907_0606a13705bc46999a995a872a32a453.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 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF3 5336 bytes
SHA-256: 64d7287944cb5f184548895c68ce3ae9a0b2d66b0830813cd4ea1f4f92ccf3cc
font_01_sfnt_off00007f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F20 10504 bytes
SHA-256: fb3fa2791d017f818dc605920ddca0ad15bae19eab1a50bce83cdbe72b00be78

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