Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd6fe21301b3316…

MALICIOUS

PDF

45.6 KB Created: 2020-07-31 06:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 318eed21e88a0d2f645ef549f0c27d90 SHA-1: 80ca47217993661af697f855f3a1dc9d54cce8c2 SHA-256: 2fd6fe21301b3316b892e6584753892eb8924e92cb3fea3939c82503e194d297
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to obscure malicious redirects. One critical heuristic identified a direct link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to academic papers, suggesting a lure to disguise the malicious intent. The ML classifier strongly indicated maliciousness.

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.ru/pify?keyword=diminishing+marginal+utility+in+investment+in+education+pdf In PDF document text
    • http://files.srm2020.org/uploads/1/3/1/3/131379718/d74c7f3339.pdfIn PDF document text
    • http://files.arisebjj.com/uploads/1/3/2/7/132710797/zujexasigeku.pdfIn PDF document text
    • http://files.now-hope.org/uploads/1/3/0/7/130776673/mitawarezub-retemepaxaxas-mosiduga.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/1/0436/3796/4960/files/32441932634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/jemorig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/43504582291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xorufolikuvuzinekotawoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1347/8312/files/76637638368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/zubaxitiwafufelilebaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/94840394343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/76257229757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/nugomibinezerig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9721/1558/files/51787059907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6792/4899/files/44779001684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/46942956009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/73940691920.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 4

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_off00007284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7284 5612 bytes
SHA-256: 0d0c19be4aaacc15eedd7d1bf1714533c8a0f280052c42bb0ef4d28d98cf0e53
font_01_sfnt_off00008571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8571 10280 bytes
SHA-256: f9db81ae85e70bf8cbe8a0acc88ec88e8c80a9e9a3a9bac7779b773c7eb528b2

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