Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8778513b6b59edb…

MALICIOUS

PDF

44.8 KB Created: 2020-07-28 05:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 65b6333946992c6fabe508c70cf5e98d SHA-1: dfbd809a58e77fdb5aa1fc1408be3ffde9865304 SHA-256: a8778513b6b59edb32beef1a2f322843776b0552054e8ba7cefbd4da57ba3291
202 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. It also exhibits characteristics of a fake invoice or payment lure. The document body, though heavily obfuscated, contains text related to 'electric bill pdf template', reinforcing the lure. The presence of a mass external PDF link farm suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=electric+bill+pdf+template In PDF document text
    • http://files.alexhockings.com/uploads/1/3/1/8/131871980/jajizemonezowetumapu.pdfIn PDF document text
    • http://files.purifoyfloweressences.com/uploads/1/3/2/6/132681495/potelabopolaxu.pdfIn PDF document text
    • http://files.scheihomebuilding.com/uploads/1/3/1/3/131398236/2520716.pdfIn PDF document text
    • http://files.storyclothdatabase.org/uploads/1/3/1/4/131483083/sutakirufaba.pdfIn PDF document text
    • http://files.jasminquill.com/uploads/1/3/1/4/131407709/lijalunitiwufe.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/1/0432/6214/8763/files/6391236094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/83142344454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6302/3518/files/92503074186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/17250570438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/xesomolowaduk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/fikimaxubam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/radufezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/zapesuxejafadojakise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/70582636751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/jadisel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/37667917211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/borutazaweluv.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 5

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_off000072f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 4792 bytes
SHA-256: a029d75fa0fa9351402ed57d390910418fcbe6cad854144dd80efd98048628fa
font_01_sfnt_off00008331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8331 10288 bytes
SHA-256: 6d6ae930b39f6160d7b0203d7ef891503fb684de30d7f3fceb08c6cc4af721e6

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