Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c4129159707704…

MALICIOUS

PDF

54.8 KB Created: 2020-08-26 14:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d9f627da0fed06c98b2ec17f0081a80 SHA-1: 40327a9d6f77a07782d30c845cf201a83d607b6d SHA-256: a0c4129159707704b88e8df8f16d93ed7fe96e66bfe82c9ca49e5d6a8a7e6e17
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is presented in the document body with a lure related to 'best sex mods skyrim'. This indicates a likely phishing or malware distribution attempt. No scripts were extracted from this sample.

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=best+sex+mods+skyrim In PDF document text
    • http://files.certainperfectratio.com/uploads/1/3/1/6/131637125/fapilowetelaji.pdfIn PDF document text
    • http://files.pact-ottawa.org/uploads/1/3/1/6/131636766/wozolavalewali.pdfIn PDF document text
    • http://files.lakeshorequiltcompany.com/uploads/1/3/1/4/131409693/gogezefu-debejiwovi-zasaw.pdfIn PDF document text
    • http://nalumakul.800steps.com/uploads/1/3/0/8/130874030/mufajal-gidadufep-nixunizo-dijarefufafi.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/1/0449/8548/3422/files/visibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/72946944919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8854/2872/files/nice_guidelines_chronic_wound_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3986/6270/files/english_grammar_check_online_free_no.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/54003233749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0076/6369/files/mipigiwezozabofazowij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/android_phone_bitcoin_miner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3560/5664/files/95968846706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4266/7676/files/kezodisuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/tegurare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/saxigonizanorarolupopipuv.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_off00009a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A98 5012 bytes
SHA-256: 7494815788b98b102110a016b4ff7fa2c2fc640b22c67742fd02aedf6f6042b5
font_01_sfnt_off0000ab9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9F 10192 bytes
SHA-256: 2ac458629c73b8b75a6a1b5f7b190116d8c80e08cd0bba96ec92641781b2f1cb

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