Malicious PDF — malware analysis report

Static analysis result for SHA-256 a401b3f3a7eade49…

MALICIOUS

PDF

54.9 KB Created: 2020-08-26 06:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f5aa6c54043b45508fb0c4900bdf36c0 SHA-1: 35c2950d505194a3d55027f3d67a3c3bfcd85ec5 SHA-256: a401b3f3a7eade49802078f9d45fd4b649c9ba524dcb937f620f4cc773ee48d4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=alabama+moon+book+online+free'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to click the malicious redirector URL.

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=alabama+moon+book+online+free In PDF document text
    • http://files.goyeouttomeethim.com/uploads/1/3/0/7/130776602/2724286.pdfIn PDF document text
    • http://kakipuj.galindasjewelry.com/uploads/1/3/1/4/131437508/bd87e.pdfIn PDF document text
    • http://files.vontoba.com/uploads/1/3/1/4/131438741/zipunux.pdfIn PDF document text
    • http://files.gemmafarley.com/uploads/1/3/1/8/131857305/ponivaxuxamut.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/1/0435/5496/3617/files/problem_statement_canvas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/alg_ii_weiterbewilligungsantrag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/persuasive_writing_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/loose_your_self_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/vozigodapimiwuzixiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/dowesakixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9301/6232/files/viguzif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1188/2653/files/8510584409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/favofimolomarexomu.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 6

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_off0000996f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x996F 4928 bytes
SHA-256: 80e503b0cbb12e3eecd2e964d88bdaf6fc2a5ddef6e8cae2b1715db8f93c2d39
font_01_sfnt_off0000aa1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA1F 10768 bytes
SHA-256: d47191823eb0fae30c35a74455910cc3f6b22da14646d84658d991a4360ed073

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