Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b91b8314315aa63…

MALICIOUS

PDF

41.5 KB Created: 2020-08-16 15:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 79ef1bbe58314418e57420ab868137ff SHA-1: 009610e7b316234cef60800afe87b783ead19081 SHA-256: 2b91b8314315aa635a948f9e39cad411252d3ec975523fc76884a9b3d3f52fe6
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, pointing to 'https://ttraff.com/pify?keyword=why+is+hellboy+rated+r+parents+guide'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many of which point to benign Shopify domains, likely used to obscure the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence for this assessment.

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=why+is+hellboy+rated+r+parents+guide In PDF document text
    • http://kiwobo.stjosephmissions.org/uploads/1/3/0/7/130739124/7685092.pdfIn PDF document text
    • http://files.cosmokoroly.com/uploads/1/3/0/7/130775247/274398.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/1/0428/6749/0975/files/54097131398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/84377421318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6317908028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7460/7514/files/jurnal_skripsi_akuntansi_perpajakan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8730/6658/files/aashto_highway_safety_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9804/6621/files/2593130001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/american_pie_watch_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/ragulapijoxazakewuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/74098264045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/31844688775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/66045744865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/42472914888.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 1

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_off000063fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FB 5476 bytes
SHA-256: 6db12c52b1cbbcc8514f55571812ec3de0420e044ebe93bd48771ef800fdad80
font_01_sfnt_off00007698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7698 10164 bytes
SHA-256: 5305050220cd8fcfc5c6e9c76e287fafb163e8cbd465914ac9e5b21dacc67e80

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