Malicious PDF — malware analysis report

Static analysis result for SHA-256 68168429d2c4b5b5…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 09:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59beacce379a7482b055b6c3c033a60d SHA-1: 401491ceb9eb21ad3274faedd18d053e83f813e9 SHA-256: 68168429d2c4b5b5ab3ec677b00488326de7d22afd2f08db9fa863d018107959
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, disguised as a source for design templates. The ML classifier strongly indicated maliciousness, and the PDF structure itself contains numerous links, suggesting a link farm or SEO abuse tactic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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/wix?keyword=free+psd+brochure+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/zasijapanosopujapimabo.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/fender_frontman_212r.pdf
    • https://cdn.shopify.com/s/files/1/0434/7228/9942/files/hindustan_unilever_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/8516/0857/files/dc_heath_and_company_worksheets_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0451/0390/6969/files/angeliq_bula.pdf
    • https://cdn.shopify.com/s/files/1/0430/7874/6261/files/64631496486.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/54632654116.pdf
    • https://cdn.shopify.com/s/files/1/0439/0679/3627/files/faxudaratemufososu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/39630921666.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/88383494722.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/lidujimalujigezuw.pdf
    • https://cdn.shopify.com/s/files/1/0441/2017/8840/files/gixipofuriv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/edit_online_free_text.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/namulanukapododejokibi.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_off000060a1.bin
650b49daf1a0297c11e9a159775eb4256444f8971885f6d0b12f4e1e7d0781da
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A1 5408 bytes
font_01_sfnt_off000072d1.bin
c97351456f13a84e3ec60dc68d692146dca5f8421ef77f71917f727ed31a1f90
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 10128 bytes