Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13f5d5bc466350d…

MALICIOUS

PDF

62.2 KB Created: 2020-08-13 23:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a3361b4c78474d3553bb3bc8dfee787 SHA-1: 0acd42fcad6a29a024fe6805b2e9f5f7922b1264 SHA-256: c13f5d5bc466350df6c2ccfbe314b4d82df25e4b23ee10bd869ab3282a70e578
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL and keywords suggesting a lure. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=arendt+banality+of+evil+pdf In PDF document text
    • http://rabinip.livingcanvasmedia.com/uploads/1/3/1/4/131453133/zemafabevuvotef.pdfIn PDF document text
    • http://jufaxefon.corkgp.com/uploads/1/3/1/4/131437736/batonetaraxamek-xuzurixedo.pdfIn PDF document text
    • http://files.pumpernickelpictures.com/uploads/1/3/1/3/131398109/7733719.pdfIn PDF document text
    • http://files.ajtve.com/uploads/1/3/1/8/131856306/9160592.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/1/0430/3015/1330/files/vomawuxabodirozitokogidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/minecraft_medieval_texture_pack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/milikulaliz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0397/4556/files/lumisijuginofamofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6631/7205/files/calculus_1_exam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/rupus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/barbulescu_contra_romaniei.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/chamberlain_whisper_drive_plus_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3056/1447/files/harbor_freight_atv_winch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/niradimape.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 3

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_off0000b7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BB 5148 bytes
SHA-256: 54f6928745c5825b3810bfa2e430385de8a5dc2e9d71f832fa2de6c650d9e44e
font_01_sfnt_off0000c953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC953 10104 bytes
SHA-256: 8feb95a115abcf5cf66baa9a8fcc59cec30dd1455c53ba23d804182ebd19364f

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