Malicious PDF — malware analysis report

Static analysis result for SHA-256 03dca1ae5e278040…

MALICIOUS

PDF

60.5 KB Created: 2020-08-05 11:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b1ab23945e75b5b60e2ea8079a7c23d SHA-1: 75747bc82c56af15b2c083b1ca57a4759b52b413 SHA-256: 03dca1ae5e278040a2cea6b23beea7926c046d386c53fa0fbac73a0827829f46
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL (https://ttraff.com/pify?keyword=karin+slaughter+blindsighted+pdf). The document body, though heavily obfuscated, contains references to the book 'Karin Slaughter Blindsighted' and the wkhtmltopdf tool, suggesting a lure to disguise malicious content. The presence of many external PDF links, some benign and some unknown, further supports a link farm or redirection strategy.

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=karin+slaughter+blindsighted+pdf
    • http://files.midwestcraftshows.com/uploads/1/3/0/8/130873717/mefitusen-nisirovotipas-zasawizo-zasifo.pdf
    • http://files.cartooncaveman.com/uploads/1/3/1/6/131607029/5432260.pdf
    • http://files.whirlpoolservicecenter.net/uploads/1/3/0/7/130738701/3006675.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/dixoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/dujisudadiputus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/java_11_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/14509878341.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/facts_about_earth.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/optiarc_dvd_rw_ad_7203a.pdf
    • https://cdn.shopify.com/s/files/1/0440/2656/0677/files/71687841085.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/cirrose_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/kukijiwixafumidezodazeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9686/files/stihl_064.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/bemafuwenukolukuwirurirun.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6601/files/58399010489.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_off0000a279.bin
c2ea3141dfff1a26e9d0f393ee345f5a39f8080a68a1e6ea5cf7ed9ad7fce0f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA279 5412 bytes
font_01_sfnt_off0000b4d5.bin
03fe1098b2cb1f1d20033f1085e6eaafa25c285330a9433dbcd0eaa476b982a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D5 15396 bytes

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