Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1c738ef8fe3860…

MALICIOUS

PDF

44.7 KB Created: 2020-08-08 18:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 959e83419b9843775d39ceafc0ed848f SHA-1: ec45357b6433f4111ed58ad1675bc1f92956048a SHA-256: da1c738ef8fe3860ef4ab3db22946e9e539e7bde09c64b4465c6ca57582e9ed7
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=arabic+english+translation+course+pdf', suggesting a lure for users interested in translation courses. The presence of numerous external PDF links, many hosted on Shopify, further supports a link farm or redirection strategy. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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=arabic+english+translation+course+pdf In PDF document text
    • http://files.deanedancecenter.com/uploads/1/3/1/4/131406344/wekalizuni_xukad_fifabujowigi.pdfIn PDF document text
    • http://files.colinwhitby.com/uploads/1/3/2/8/132814996/8733788.pdfIn PDF document text
    • http://files.wintercup-sportklettern.org/uploads/1/3/2/7/132712011/vupuxexise.pdfIn PDF document text
    • http://files.cookcreativemedia.com/uploads/1/3/1/4/131453919/gawiwiwovawa.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/1/0431/9058/3458/files/josurexitajidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4544/6044/files/bimik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6294/2106/files/47552502669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2702/8375/files/36493847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/serosogunuxugukipoluwinix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/assessment_and_evaluation_in_science_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/32384018828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/30869897212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/92729136636.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_off000070f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F4 5544 bytes
SHA-256: f054b05ca273e895baf3836fa5a38b5ece65e2a9313aed19d8a9941d23c1f1c8
font_01_sfnt_off000083be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BE 10156 bytes
SHA-256: e7f4fda242aacc6b0f86565c3e82120938c68f2588bc53b0b592386f30c4447b

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