Malicious PDF — malware analysis report

Static analysis result for SHA-256 539bfe4751f6d531…

MALICIOUS

PDF

44.4 KB Created: 2020-08-21 11:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb1bb888c8c1598dc0e8d1f3552b060d SHA-1: dd2cab025ef9397286e2a65cdd0b293c6a4e1c14 SHA-256: 539bfe4751f6d53109f69d97bbe458e1d4974117d01c10c9c8f78e423bcc3942
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Cargill inc annual report 2015' and the malicious URL, suggesting a phishing lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links, likely used to obscure the malicious redirector. The primary malicious IOC is the ttraff.com redirector URL.

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.com/pify?keyword=cargill+inc+annual+report+2015 In PDF document text
    • http://gexabinov.pre-protein.com/uploads/1/3/0/9/130969761/120f35.pdfIn PDF document text
    • http://files.filipinocursillosf.org/uploads/1/3/1/1/131163879/6df242.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/1/0440/2118/6718/files/pneumatosis_cystoides_intestinalis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/16195770928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9585/8088/files/75456981372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/netalaguliji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4932/0597/files/48086471962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/sejafekabaxezatakap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/73633445204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/hotel_italia_buongiorno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/juwexejekufij.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 6

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_off000061c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 5276 bytes
SHA-256: 76dbd93de22f39d827caf08cc481b8c1a57c2e1a046decfead44cb0206145165
font_01_sfnt_off000073c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C8 10132 bytes
SHA-256: 47376de005c4f7088e3f229e20a8f7141797388b1f77dff3b46444af7f7876d8
font_02_sfnt_off00009662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9662 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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