Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a39ffc8d6631fc…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 23:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b97811af3972a2f1d61f7916a749cb5 SHA-1: 44d2d4f850ea16ca94bd64dc2c331cc7f1c4d8ce SHA-256: 90a39ffc8d6631fc42ca310f1fdc119566feef7d0cb2593d0a0a469a9aa5a4c2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning attack designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack pattern involves a deceptive lure to click a malicious link.

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.cc/pify?keyword=calendar+related+aptitude+questions+pdf In PDF document text
    • http://files.thevillageyarnery.com/uploads/1/3/2/7/132740805/2017469.pdfIn PDF document text
    • http://files.mifflinfootballgolftournament.com/uploads/1/3/1/4/131482958/9041386.pdfIn PDF document text
    • http://files.fbcsnyder.com/uploads/1/3/1/4/131406780/27c5c31b8f85.pdfIn PDF document text
    • http://nulib.markers4health.com/uploads/1/3/1/3/131383965/7885900.pdfIn PDF document text
    • http://files.yippeewebdesign.com/uploads/1/3/2/7/132740533/8726418.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/1/0427/9477/8791/files/kubuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/kefutarukepew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/batowemafotuxuxan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/7397121198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/99084256487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/91680682253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5989/5717/files/biraj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/nemexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9942/2871/files/49119374776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0511/4528/files/nirvana_buddhism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/peguzegi.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 7

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_off00006700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 5064 bytes
SHA-256: bc4d785bf5450eb528e4a25898ac60ebda430799182460925af156bdb112628b
font_01_sfnt_off0000783d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783D 9872 bytes
SHA-256: d5364fdabedfeb7ed464ee1d678f4c93dbda810839199d14f1fb0380574fd136

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