Malicious PDF — malware analysis report

Static analysis result for SHA-256 70145da0d1313b54…

MALICIOUS

PDF

47.0 KB Created: 2020-08-30 03:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b8bd482fee362d88158811cb01cd689 SHA-1: 861293b0b4d6854880f8639d3e30095ff06795d5 SHA-256: 70145da0d1313b543c5190813272d09efe1458a39a267a1056915ee33c7e457f
154 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to 'Warhammer 40k apocalypse' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links further supports a malicious intent, likely for SEO poisoning or driving traffic to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wix?keyword=warhammer+40k+apocalypse
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_81611af586b04fcfa36ba52566eaba96.pdf
    • https://static.usrfiles.com/ugd/b8c837_612b98f10a354772a52a65cf8179cb66.pdf
    • https://static.usrfiles.com/ugd/590778_9f7bb95561fd46d2be977c31459281fa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7624/files/28667438973.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/62003349272.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/62678725855.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/5074717542.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5289/files/28812135705.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/51684047826.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/40142452977.pdf
    • https://cdn.shopify.com/s/files/1/0447/9628/0983/files/candida_bucal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/riesgo_cardiovascular_framingham.pdf
    • https://cdn.shopify.com/s/files/1/0437/4708/2389/files/zaxazebisi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d1b.bin
6ac6a8136592f4a9f3fed7a78a2bae38c72a2f646957f7433b2c9f22625fd8b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1B 5136 bytes
font_01_sfnt_off00007e97.bin
dd3b573b6772c5c425b8797649de20c30a708a8fa9940f6862e2cd454633459d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E97 10192 bytes
font_02_sfnt_off0000a189.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA189 4324 bytes

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