Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf88a5dd76ac453…

MALICIOUS

PDF

49.5 KB Created: 2020-07-31 14:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0dcc0b5ee7c42deab7c441e75348d4f6 SHA-1: 221d398f498fa3ada7f80939e78c447b163673a8 SHA-256: ecf88a5dd76ac4530fbe7a2d72311c8a9b753e9a4bae6421fb563c77efe276f7
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a mass external PDF link farm, with many links hosted on cdn.shopify.com. The primary malicious URL is a redirector that includes a keyword suggesting a lure for a tenancy agreement template.

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.cc/pify?keyword=simple+tenancy+agreement+template+pdf In PDF document text
    • http://files.bmwclubulstersection.com/uploads/1/3/2/6/132695492/6313870.pdfIn PDF document text
    • http://files.sultztonianinstitute.com/uploads/1/3/0/8/130874058/suzipunajifubu.pdfIn PDF document text
    • http://files.erasmuspeak.com/uploads/1/3/1/4/131483584/2944976.pdfIn PDF document text
    • http://files.stoewer-cars.com/uploads/1/3/1/3/131378868/dejavogezaninuraji.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/1/0434/5895/3381/files/wulararu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/lisifarukavawidasupolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/kibavizurunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/36335335374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/30895636467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/mexuberi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/31697795496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/bugoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/gemugimidov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/90053346891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/xodofatisowuxiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/99917075146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1103/7591/files/saduves.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_off00007e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E36 5180 bytes
SHA-256: 0a1f59b8956d7afc6bc9de955b097fddfa8406c369c212d3a3613d379e91f081
font_01_sfnt_off00008fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB3 13044 bytes
SHA-256: 5b429dc4f184bcdde28a8ec42aec0c0d7f96687f0d5dc18e866385d11ef4b310

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