Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f488e20e7e02f1…

MALICIOUS

PDF

51.7 KB Created: 2020-08-18 17:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a473d7edb2a6415adbf69c4162905878 SHA-1: 3cc3e6fb3fa6833259eb105af959eb86b88c3156 SHA-256: d6f488e20e7e02f1f57c3ca59d8c73cbdb33e8c94ae4472d644316f2c0550304
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links points to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's not a typical user-facing document but rather a tool for link distribution.

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=atalayas+antiguas+en+pdf In PDF document text
    • http://files.texascenterforregionalstudies.net/uploads/1/3/1/8/131856381/29afc.pdfIn PDF document text
    • http://munoxamak.getbentzfarm.com/uploads/1/3/1/4/131436978/2052274.pdfIn PDF document text
    • http://pifot.mystiquedogkennels.com/uploads/1/3/1/3/131380500/lonapusakefobok-kinepepodulawun-sexen-sikapokuwaz.pdfIn PDF document text
    • http://files.erikharmens.com/uploads/1/3/1/4/131407144/5631300.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/kidetamazoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4455/9258/files/zoology_miller_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/ukulele_chord_chart_with_finger_numbers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/86599661904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/14141093209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4044/8410/files/catch_platform_osha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/57928345502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3400/2086/files/wexavatujonedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7236/3432/files/aviva_healthier_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/61878607774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/nier_automata_dented_socket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0540/0472/files/siludejomas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E09 4976 bytes
SHA-256: d922dd58dd6f0c6d9eccbe9f4669e5fabbaade82100fa3dfa7241790d19456aa
font_01_sfnt_off00008f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F11 11356 bytes
SHA-256: 8ac036d341f452efa8a78f040b22d37f5e59feed82f2e0bb67917c62e9c7a109
font_02_sfnt_off0000b402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB402 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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