Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1c940c7997a28a…

MALICIOUS

PDF

45.9 KB Created: 2020-08-11 00:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0972832133391655bb3e5878a6e8a51c SHA-1: 79b17e6f67f0cb60b23e200bfae6e5f6d095efe0 SHA-256: 3b1c940c7997a28a8ac4bb40bfd8ebc6c61529230e700d73ea8b348f1c470d7a
194 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=unir+varios+pdf+en+uno+mac'. Another critical heuristic indicated a PDF link farm, with many links pointing to external PDF files hosted on domains like cdn.shopify.com and other file-sharing sites. The document body contains garbled text but also includes the same suspicious URL and several Shopify-hosted PDF links, suggesting a lure or redirection mechanism.

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=unir+varios+pdf+en+uno+mac In PDF document text
    • http://files.earthboundgardens.com/uploads/1/3/1/8/131871701/gotonetun.pdfIn PDF document text
    • http://files.imanshaggag.com/uploads/1/3/0/8/130874110/pozibutofim.pdfIn PDF document text
    • http://files.imadeaver.com/uploads/1/3/1/0/131071043/39df4f4b665.pdfIn PDF document text
    • http://kenilebij.artlynchactingcoach.com/uploads/1/3/1/6/131607163/8462312.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/1/0431/6377/9240/files/sipojumitoruluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/94562164804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/95380301547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/anteversion_femoral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/convert_scanned_to_word_abbyy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/taxomalulagawajalez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/lubixuwomubivadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/o_que__epigentica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/ccna_routing_and_switching.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_off0000721c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721C 5320 bytes
SHA-256: 016e5f1e03236cf2934775340a87d48afffd1e6e0b92898712120a5a4515f749
font_01_sfnt_off0000841d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841D 11448 bytes
SHA-256: 91546a5bdc540e967d37a1805a063391539891e53b4d3cd13d291372eebbac51

Open this report in the interactive analyzer, or submit your own file for analysis.