Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb78ed512c9aeaa…

MALICIOUS

PDF

35.6 KB Created: 2020-08-20 05:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e4dc76b83b9a559767363b3f1f182b1 SHA-1: d373e4c42b0f7a756858d4ced703c7da92f3f464 SHA-256: 7fb78ed512c9aeaa2f2fdcafbf34f5b6f49a4c77345444750052085baef9597e
194 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to a redirector service that is flagged as malicious. The document body itself contains the URL 'https://ttraff.ru/pify?keyword=composite+functions+worksheet+algebra+1', which is likely intended to trick users into downloading further malicious content or visiting a phishing site. The presence of many links to external PDFs, some hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=composite+functions+worksheet+algebra+1 In PDF document text
    • http://files.mhcs.me/uploads/1/3/0/7/130775652/fonuwidumajovuxa.pdfIn PDF document text
    • http://files.jhwelchdesigns.com/uploads/1/3/1/3/131398019/a211b22.pdfIn PDF document text
    • http://risef.funseekersrebel.com/uploads/1/3/1/8/131856318/rovigiwej_wasawonodidi.pdfIn PDF document text
    • http://files.orchardavepta.org/uploads/1/3/1/4/131452804/9878838.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/1/0437/3485/9941/files/50168762460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/xanathar_s_guide_to_everything_races.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/bejepababejolata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7791/7085/files/neural_network_algorithm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/awakened_empath_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/cuisine_algrienne_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/16681687047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0802/3966/files/nonprofit_bookkeeping_and_accounting_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/67967907641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/mapa_carreteras_castilla_leon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/vizezobinefukifapizalabaj.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
🗂 Part of campaign: mhcs.me 4 samples

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_off00004c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2C 5680 bytes
SHA-256: 0ac3aab16b99431a256145b3173d51f2e8ed6a65520d79170c2a9b91e196cc88
font_01_sfnt_off00005f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F72 9560 bytes
SHA-256: e151d7ef4a406858f1ed1d7a6a27cfd1469533e48682df21c9f6848a243bb401

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