Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a069fb5020f350…

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 15:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9b1a147269e0aea2c23148db377bf33 SHA-1: b4725413a0a6387135541c65839dd4811416a21d SHA-256: 68a069fb5020f3505aa50bf8ae569f942f0b2afc4b34fa3baa970cf599fbae46
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=automatic+voltage+regulator+for+alternator+pdf'. The document body, though partially corrupted, contains text related to 'automatic voltage regulator' and mentions 'wkhtmltopdf', suggesting a lure document. The presence of numerous Shopify links, some flagged as benign, alongside the malicious redirector, points towards a campaign distributing SEO-optimized content that may lead to malicious sites.

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.com/pify?keyword=automatic+voltage+regulator+for+alternator+pdf
    • http://files.3jsauto.com/uploads/1/3/2/6/132681670/wufibagelifaz-fixidawumu.pdf
    • http://files.catholicinfertilityministry.com/uploads/1/3/0/7/130776735/kiwagejekizufex.pdf
    • http://files.thomasachadwick.com/uploads/1/3/1/6/131606758/xufulif_pilalojeda_tuduwu_jazedebowamoma.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2011/4331/files/24467192533.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/fuboturu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4089/0262/files/27186895349.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/zuratusefidisogax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67279733654.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/tiwenitot.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4316/files/jetezogavodiwubemu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/twitter_discord_bot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/72689200946.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/vuvotavajinef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pekuxiwitijumowiviw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/kenavi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4880/3227/files/lanapukoronubozewivol.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_off000066e7.bin
18e7c830473b5e135a530a7d811021ca27aa05b9c7d90aa08b9fabd4aaf074ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E7 5348 bytes
font_01_sfnt_off00007905.bin
cc6a10293ea5c32368142ad319533b62dfe6a0503bf04654d113de932eb41489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7905 9816 bytes

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