Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc5f2960515836e…

MALICIOUS

PDF

32.4 KB Created: 2020-08-24 01:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0545713d8f2f8ef02ecfc208564753e SHA-1: ae57d1f5c4f64b4004233c40970176b265554c67 SHA-256: 2bc5f2960515836ef84c4f0db3fa638d6e6593ce797d8ee50f4710ee38179517
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a "free song" lure, indicating a social engineering attempt. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=we+no+speak+americano+song+free In PDF document text
    • http://files.pascalab.org/uploads/1/3/1/8/131856392/fagoxobar.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/1/0433/9197/5580/files/tufokafizab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/volide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/bacaan_surat_yasin_dan_tahlil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/lobuxukovavimaduzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5484/5352/files/initial_counseling_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/69075181775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/fuwefave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7222/4421/files/mosigefezobobefonebulu.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 1

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_off00004102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4102 5380 bytes
SHA-256: 44e5a7b12154db58d858bfb7f895a7ead36024d2525b05178d5a74b3a2db31b7
font_01_sfnt_off0000534d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x534D 9932 bytes
SHA-256: c73f91e8322a76ca181274be2623df48bbc481bee7a9bbdf93f20c2c09b005cc

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