Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a719aa60b05a8f6…

MALICIOUS

PDF

46.6 KB Created: 2020-07-29 21:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 955d61ff3dc623b6065d246fc814dc58 SHA-1: 6f5ea19f1a64b315a9ec6dfb71b35cd6706122b2 SHA-256: 0a719aa60b05a8f67568e60994468609c3f4e3302a5f5a6531ace20dc79f1635
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a link farm or phishing lure. The document body and metadata indicate it's disguised as a utility for PDF manipulation, a common social engineering tactic. The presence of a password-protected archive lure heuristic further supports the intent to conceal 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=adobe+split+and+merge+pdf+files
    • http://files.communiservenashville.org/uploads/1/3/1/6/131637313/1684186.pdf
    • http://files.kcsaussies.com/uploads/1/3/1/6/131606035/4790224.pdf
    • http://files.islandbeautyportland.com/uploads/1/3/0/9/130969243/522dd448b29a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/nunomuvosiwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/zabefevavudixatudizi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4243/files/48489726790.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/19543720292.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9000/files/xinonodaxetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/97458593598.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/vepumomav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdf
    • https://cdn.shopify.com/s/files/1/0433/8031/0174/files/31630404591.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/34504350665.pdf
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/46212619734.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/29067173774.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000777a.bin
e3fef8650760293427091305515768cd9d14edfd04c1a7e5003be5ce1f519ae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777A 5280 bytes
font_01_sfnt_off00008948.bin
fefedf26a70a296a603ee07df0906806e747798b7da8b44867e716e925e8659d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8948 10464 bytes

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