Malicious PDF — malware analysis report

Static analysis result for SHA-256 7240be0a16d000e2…

MALICIOUS

PDF

46.3 KB Created: 2020-08-13 18:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b26b57f82f344be87639c3e417812e2 SHA-1: 69485ab1bf206cd7eb697e1275c2478ecc160234 SHA-256: 7240be0a16d000e2176a3d633b6e5e789d298312491796ce8125a4b4b03f3ce9
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wb?keyword=whirlpool%20wfg320m0bs%20manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and other benign-looking Shopify URLs, suggesting a lure to a malicious site disguised as a search result. The presence of numerous PDF links and the ML classifier output strongly indicate malicious intent.

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/wb?keyword=whirlpool%20wfg320m0bs%20manual
    • http://files.sisterspiritwomensharingspirituality.org/uploads/1/3/2/8/132815154/58853863.pdf
    • http://files.gcchurch.net/uploads/1/3/1/4/131453651/wikemusuzolulomidov.pdf
    • http://files.montaukbeachbungalow.com/uploads/1/3/0/9/130969204/e32d63fc17557.pdf
    • http://files.stretch-n-growop.com/uploads/1/3/2/7/132741482/c20e7.pdf
    • http://files.stephaniebershyoga.com/uploads/1/3/1/3/131379371/1049198.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/nupisuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/nightmare_on_my_street_will_smith.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/lupumomofegixatizi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4970/5881/files/26387653010.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/20991471564.pdf
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/online_accessibility_checker.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/botapepumapimenerinejunaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/1658/3325/files/23068114403.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/taxugozekirex.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/ruwisolala.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/baxokiwusovofujopuxaz.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bb7.bin
727eb421393337620b9f4f6c44bed328ebea765dd558a83bf4ed136fa30c66fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB7 6000 bytes
font_01_sfnt_off0000701b.bin
53422021ba50fe57c27091fdc6bc1ebfd55e105da8c2d12bf7d5319e2031a066		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701B 11428 bytes
font_02_sfnt_off000096ce.bin
caaaffff64a8393f170e6a276c9ee603a1392e804a39ea3940e3b76f57d0ada7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96CE 16232 bytes

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