Malicious PDF — malware analysis report

Static analysis result for SHA-256 1282d73c60c19517…

MALICIOUS

PDF

43.2 KB Created: 2020-08-03 20:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47e4fe984ee913e367f6bab45ed4f0c4 SHA-1: c66e64f68033af33024baf957a36326b6747e9ae SHA-256: 1282d73c60c195173357354f57af6116f283002ed16dab86ddcf97c0add84ecd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `ttraff.com`. The document body, though heavily obfuscated, includes the same URL and a large number of other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious.

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=road+and+building+engineering+pdf
    • http://files.mccullochsfitness.com/uploads/1/3/0/7/130775286/letijufuxir-rovevuruz.pdf
    • http://files.nafsijewels.com/uploads/1/3/0/7/130775978/508b806bff.pdf
    • http://files.cockatooparkmorgans.com/uploads/1/3/0/8/130813489/dikevejomesaziv.pdf
    • http://files.okanagankootenaywelldrilling.com/uploads/1/3/0/8/130815095/0bad2af6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/rorurusaxigasoxaxuvobuj.pdf
    • https://cdn.shopify.com/s/files/1/0448/3701/1613/files/fraleigh_abstract_algebra.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5281/files/javascript_get_mouse_position.pdf
    • https://cdn.shopify.com/s/files/1/0429/3620/5479/files/ti_89_games.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/bofotesuket.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/sigixuguxofidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3555/files/59267379743.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/17660105166.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/boroxamuketiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/33187687627.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/zabututo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3772/6622/files/lasibari.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_off00005fb7.bin
5a4c50757ae69c00f98e06123e6da2b96e633ad9d92bf36b26822d936d35aa40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB7 4980 bytes
font_01_sfnt_off000070a7.bin
690c7c77ae3b22cfbe8f01b78f521fdd250a48c4b681ad75f2912f489394184d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A7 9632 bytes
font_02_sfnt_off00009190.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9190 4324 bytes

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