Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c466bcf631c8aaf…

MALICIOUS

PDF

45.1 KB Created: 2020-08-08 09:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 899e62a35c8fb1797619087d4b154ad8 SHA-1: 850d13112fe468e6f8ef5416e0e58c91276dc926 SHA-256: 3c466bcf631c8aaf945d87030bd69d734ecbfff90827864861052ada13855c46
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=aprender+a+dibujar+rostros+realistas+pdf'. The document body, though heavily obfuscated, contains text fragments related to drawing and the PDF generation tool, suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content.

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=aprender+a+dibujar+rostros+realistas+pdf In PDF document text
    • http://files.moirsa.org/uploads/1/3/1/3/131382808/lulinuzigutoxe.pdfIn PDF document text
    • http://files.annalisacrawford.com/uploads/1/3/0/9/130969312/7579905.pdfIn PDF document text
    • http://files.atyourservicelimosjax.com/uploads/1/3/1/3/131383318/6830482.pdfIn PDF document text
    • http://nafup.ericmouledoux.com/uploads/1/3/0/8/130813834/3b41cbcd27.pdfIn PDF document text
    • http://files.christiansciencegreatfalls.com/uploads/1/3/2/7/132710565/820be361ae87b6.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/1/0433/5704/4904/files/82007301525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5385/9494/files/branson_3510_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/sifufuzebekuvodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8782/9928/files/37921947271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/vedabimigakasot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/doragewotupepefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/vosevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/55588099125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3864/4136/files/87553144210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4339/7525/files/acceleration_definition_physics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/mazuzagulijowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/mount_and_blade_star_wars.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_off00007147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7147 5240 bytes
SHA-256: 508e8b06c24cdace81f352d532259494aeb67689ca4cc23e4cf23980958efd78
font_01_sfnt_off00008323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8323 10464 bytes
SHA-256: a5a96fb361c0600569c3d3ee814ce805f81b28632ee3460022459b5ce0f96a08

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