Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb91793bacbc3dc1…

MALICIOUS

PDF

34.0 KB Created: 2020-08-23 04:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c29aceef8e73c05d8ce5ba61d7b885d2 SHA-1: 19e04ed10a28efa0e3f5dcfa4d6d832a7301191b SHA-256: bb91793bacbc3dc1c9b6d03fef6a8fef382f5ac9b05772e2287912e6cdbc1abe
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it features a PDF link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword that appears to be a lure. No scripts were extracted, but the presence of multiple embedded URLs points to a redirection-based attack. The ML classifier also strongly flagged this PDF as malicious.

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=callan+method+stage+3+pdf+chomikuj In PDF document text
    • http://files.mckenzieareadayhomes.com/uploads/1/3/1/4/131453894/937327.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/1/0429/0864/7580/files/malayalam_kambikatha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/98974449165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5506/2948/files/kisumadiwarogukoxakigivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/poe_leveling_uniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2296/7206/files/501c3_church_exposed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7252/8292/files/tceq_above_ground_storage_tank_registration_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/23814233056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/91908894668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/6958529137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/rawexobowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/nilibimubobage.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_off000049be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49BE 5684 bytes
SHA-256: a330f520de14be67992170a6c900ce0252b6297dc23caa0f5546ce9c53a3e1af
font_01_sfnt_off00005d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D01 8964 bytes
SHA-256: 1f285ee8ebc0a40ad94ad3021c7a47f9512951307f122aa2f0f10a0b4701628b

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