Malicious PDF — malware analysis report

Static analysis result for SHA-256 9caffb2882f0be17…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 16:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7b729d7599f498dd9d2ec7bb071355a SHA-1: 62204893ea8382f094929482b4fd238fae35bf30 SHA-256: 9caffb2882f0be174c73fe1e6fd3fe0fbb1606bac83deed2d1e91445cd336554
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicates maliciousness. The presence of a callback lure heuristic suggests a potential phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=ammonium+lactate+davis+pdf In PDF document text
    • http://files.stevemillerworldview.com/uploads/1/3/0/7/130739062/6025175.pdfIn PDF document text
    • http://files.samuelcjohnsonartist.co.uk/uploads/1/3/1/4/131406104/43a1f.pdfIn PDF document text
    • http://misal.pcconcertseries.org/uploads/1/3/2/6/132681647/gaseb_jexokitezuj_viditufumu_fukezabi.pdfIn PDF document text
    • http://files.hazelsnetogo.com/uploads/1/3/1/4/131437139/lamodutori-tekurazesofa-vezavebexa.pdfIn PDF document text
    • http://files.breatheserenity.com/uploads/1/3/0/9/130969746/jijaz-pitojepu.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/1/0430/3618/0634/files/mpdf_border_radius.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/un_mundo_feliz_aldous_huxley_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6229/6725/files/viwinivugoxazukelan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3260/7900/files/laralofekikisakibage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/lanodiwegozod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/26369234237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/86862431925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/joxojo.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 8

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_off000069ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AC 5252 bytes
SHA-256: fd4c22d91bc5499255c526f9bcd7caf4bf7dab4cadc8e0868f7fd0f9c61ca5bf
font_01_sfnt_off00007b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B84 10296 bytes
SHA-256: 7ac8086f84cd2138845b2b1f5f0274093efa08c3ca025de9293aeac373400a95

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