Malicious PDF — malware analysis report

Static analysis result for SHA-256 267756d3ae39bd93…

MALICIOUS

PDF

58.0 KB Created: 2020-08-10 21:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e058d8451320a2f47033d3057b1bf185 SHA-1: 3763a7d7ebd31f6f7162d855a8c526c0dd823ee1 SHA-256: 267756d3ae39bd93f350cc7832c81386dd046707adc995f47db747794d094369
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=bored+pile+foundation+pdf'. This indicates the document is designed to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. 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.cc/pify?keyword=bored+pile+foundation+pdf
    • http://danisoreg.healthstyled.com/uploads/1/3/1/4/131437812/c0a6aa26d9f7d4.pdf
    • http://fugaxej.flyintofirstgrade.com/uploads/1/3/0/7/130775818/3541845.pdf
    • http://files.photosbyjlm.com/uploads/1/3/0/7/130775737/4778782.pdf
    • http://files.sketsamoda.com/uploads/1/3/0/7/130738714/xomugizalojoten.pdf
    • http://files.covidppemarket.com/uploads/1/3/1/4/131452817/rinaxef-loroked-ruvuzifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87678197609.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6766/files/athletic_body_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/34289185756.pdf
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/fumuvalidogagotukovirarus.pdf
    • https://cdn.shopify.com/s/files/1/0439/4162/6011/files/68561076373.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/2458086073.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/airland_battle_doctrine.pdf
    • https://cdn.shopify.com/s/files/1/0434/9935/6324/files/75898539088.pdf
    • https://cdn.shopify.com/s/files/1/0433/2440/7961/files/41528985888.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7239/files/nafapubomitofukekilozimun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/sadigadewekewawawodafali.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009897.bin
fa6b121daa9bb73c4b031a3a1456c4bb05b072209eafda36434e6772f2d65fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9897 3564 bytes
font_01_sfnt_off0000a53f.bin
1b1deed347b55aed21355976ca5c718cb250591faba367b74804c59aed68104d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA53F 4908 bytes
font_02_sfnt_off0000b5fd.bin
940cedf69cef128437fc28f1023c5878bde40de11f3de6292032287d13d287e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FD 10424 bytes

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