Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9d71ea3525571b…

MALICIOUS

PDF

46.4 KB Created: 2020-08-07 00:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1fde59f676508e1b56e07fd9d9ceb375 SHA-1: 75a3e9a765031d2029064075c959a1171cb6061d SHA-256: 2a9d71ea3525571b49e896f282b73582698bc5c520e03f722d341dca2a7fa513
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One prominent URL, 'https://ttraff.ru/pify?keyword=campylobacter+jejuni+en+alimentos+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the redirector URL and another Shopify URL, suggesting a coordinated effort to distribute malicious content through a network of 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=campylobacter+jejuni+en+alimentos+pdf In PDF document text
    • http://livufepud.kitchenkutz.net/uploads/1/3/0/9/130969472/2047735.pdfIn PDF document text
    • http://files.dartmouthregatta.co.uk/uploads/1/3/0/7/130775795/2938170.pdfIn PDF document text
    • http://files.montgomerychurch.com.au/uploads/1/3/1/8/131871849/9938135.pdfIn PDF document text
    • http://files.shabby2chicsalonandspa.com/uploads/1/3/1/4/131438464/ruvilopusufirokerez.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/1/0431/8386/6018/files/duponunedosumazarifew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mukevomisuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/sopitigumavukiduzokijelef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/80426673037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/list_of_magic_e_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/80377148793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/82065808019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4365/8650/files/71577854696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6637/2775/files/low_back_exercises_handout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9809/5262/files/nugulurofu.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_off000076bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BB 5524 bytes
SHA-256: 05f88343a9000557ff932801039bc9b6b87aca90abcd7a6d3b21874b540d771f
font_01_sfnt_off00008972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8972 10184 bytes
SHA-256: 757e71b40d9d1f7e2562f2bfc977d9f10a61fd15cc7201141b666ee8263c5581

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