Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7a950b4fb0db26…

MALICIOUS

PDF

48.8 KB Created: 2020-08-08 10:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6d54d5824a79adbe57647cc5b54a04f4 SHA-1: 534282d6339422909018691e1d5f435fba92dbdc SHA-256: 1a7a950b4fb0db260c738c5579fd976123760cf5a3cbd9759df6774ce69fcfc1
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one heuristic specifically identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=prepositions+of+place+esl+pdf'. Another heuristic indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or to obscure malicious destinations. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack pattern involves luring users to click on these links.

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=prepositions+of+place+esl+pdf In PDF document text
    • http://files.masoncru.org/uploads/1/3/0/8/130874647/jopojenovuki.pdfIn PDF document text
    • http://files.westwellpark.co.uk/uploads/1/3/2/3/132303134/kivever_vufubofewabaseg_fosibat_julazitaxi.pdfIn PDF document text
    • http://files.dawsonfoundation.org/uploads/1/3/1/3/131398194/xigukiwofez-vifarekusagin-dekibebuzo.pdfIn PDF document text
    • http://torif.professionalbowhunters.org/uploads/1/3/0/7/130775997/magijezofo.pdfIn PDF document text
    • http://files.beccarothfeld.com/uploads/1/3/0/8/130874326/20e7cfe6.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/1/0434/3152/6561/files/meduretetulagemoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7663/0181/files/eight_hundred_dollars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/gogoxana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6794/9724/files/linuxopodob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/75297720101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5419/5097/files/saludoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/86537651913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/15632210789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/posoriwifokewibig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4218/4095/files/tujudobobap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/gepesizedotorugobujaju.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4B 5152 bytes
SHA-256: 177402241c343062a64adedd8404b789c89464b242ff820a26c988fafffe936c
font_01_sfnt_off00008cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDD 13384 bytes
SHA-256: 0a4b4082a24fe34fc18a7b986dd56e832086582a926faaad83a87860389df4f7

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