Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c932d374ab6c9be…

MALICIOUS

PDF

43.9 KB Created: 2020-08-01 15:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7564bbf802771152cf9cdc51cff1f0a5 SHA-1: 7f151c02f4ba8edb6e0452a465bb3db99d1abc6e SHA-256: 8c932d374ab6c9beea00a5e0274cb9ffb4196939073a91aac0666db2f847fb20
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate academic resources, but the primary link redirects to a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded URL https://ttraff.ru/pify?keyword=financial+accounting+weygandt+9th+edition+pdf is part of known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute malicious content through seemingly benign links. The document body contains garbled text but includes the suspicious URL.

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=financial+accounting+weygandt+9th+edition+pdf In PDF document text
    • http://files.mksheatsteachingportfolio.com/uploads/1/3/0/7/130739490/64a0e5a89b178da.pdfIn PDF document text
    • http://files.lifestyledetails.com/uploads/1/3/1/4/131482886/kudiwujifur-bepeder-pifegiwi.pdfIn PDF document text
    • http://files.celestialstarsdance.com/uploads/1/3/1/4/131453588/jewatukiba.pdfIn PDF document text
    • http://files.zenobirr.com/uploads/1/3/2/6/132682851/e8c85cc3500.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/1/0431/8747/0494/files/jilulezomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/jawede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/51353160255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kitona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/21772374199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/putonijigifitekil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/kikabul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/87287467016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3917/6357/files/52416727502.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5F 5448 bytes
SHA-256: 1647416a350e10938b6766a21f45633347b84d64ac04ac20f31b389b598582d1
font_01_sfnt_off00007e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E02 10856 bytes
SHA-256: a1863a641125c2777c9fa722326b1c8d3f416d1086ce66045306f3f04b31a0ea