Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5783b42b2cd5478…

MALICIOUS

PDF

49.7 KB Created: 2020-08-24 21:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1cb8890a92b8961e62dccfef6248c01b SHA-1: afb50f4bdcc419e2ce87339d4b5c6f9000323fb4 SHA-256: a5783b42b2cd5478784eeb0439a551f26dd04840a84fde03ae0371286e74538b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous PDF files hosted on Shopify, with a primary redirector URL to 'ttraff.ru'. The document body, though partially garbled, includes the text 'Fractions into simplest form calculator soup' and the redirector URL, suggesting a lure to disguise malicious activity. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector confirms a high likelihood of a phishing or scam attempt.

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=fractions+into+simplest+form+calculator+soup In PDF document text
    • http://files.katherinekoehlerphotography.com/uploads/1/3/0/7/130776054/8a3419db.pdfIn PDF document text
    • http://files.tallcitytint.com/uploads/1/3/1/3/131398360/gomirevobajezunosu.pdfIn PDF document text
    • http://dosepidag.treatingcbs.com/uploads/1/3/1/1/131163664/tarajix.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/1/0433/0687/7080/files/sibubemazalomasedexikeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/9562415741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/jebafomiwob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/86683865051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/96294551088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/91553628720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/nowunerenudagezuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/zokalir.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_off00008694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8694 5116 bytes
SHA-256: fa80477eaa18ad6b2b7265a0ebb98e54f7cb06429098f7fa2f267396da8398f0
font_01_sfnt_off000097e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E2 10052 bytes
SHA-256: 4659b7c049f83323dd978a99c77d01c6e29c023e2412c5bed99b3fe668d69820

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