Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bcb2ac594e7afa…

MALICIOUS

PDF

40.4 KB Created: 2020-08-15 03:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e935e9a8e6d5269f43c9634075233f3 SHA-1: 20855acfa01d309c32bee481d0a253442a737cf1 SHA-256: 80bcb2ac594e7afa49288fdb910c55895c133a34bac376a698db7f45adbf1ff9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to SEO-optimized PDF files hosted on Shopify, suggesting a link farm or content stuffing tactic. A primary redirector URL, https://ttraff.com/wb?keyword=civilinio%20proceso%20teise%202%20tomas%20pdf, is identified as malicious. The document body, though heavily obfuscated, contains this same URL, indicating its importance in the attack chain. The ML classifier 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.com/wb?keyword=civilinio%20proceso%20teise%202%20tomas%20pdf In PDF document text
    • http://zofenek.tdcwebstercity.com/uploads/1/3/0/8/130873995/eeeba5f.pdfIn PDF document text
    • http://files.psusdarts.org/uploads/1/3/2/6/132695416/sefuvozemajigutoxuja.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/1/0433/7205/2643/files/medical_waste_disposal_methods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5496/0533/files/74749354812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/vudumapokebefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/puzunebukunebutiwikekom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/6650334768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/gewined.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/31703563342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/tewapurevame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/66787296588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/slavery_in_west_africa.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 4

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_off00005063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5063 5400 bytes
SHA-256: 0fc866002c372b4dfe4c9890a58513f3e3f32afa43ef6d1e372f95b0bbc5b5b0
font_01_sfnt_off0000629f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629F 16636 bytes
SHA-256: cef566c18ba20f9a32c861beae0b7e992032b332090bc8294ff079a1d448abda

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