Malicious PDF — malware analysis report

Static analysis result for SHA-256 2674645e6d28a268…

MALICIOUS

PDF

62.1 KB Created: 2020-09-01 10:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28a660ecf3ad98e0f21735077ea70561 SHA-1: 402201f1562e4079550f97c55e0687cf2b73caa0 SHA-256: 2674645e6d28a268b9bb761d01b650f2268a8cfc66a62dd039021f71f1422dc7
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, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=hitchhiker%2527+s+guide+original+cast', is designed to redirect users to malicious content. The PDF also exhibits characteristics of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious links broadly. The ML classifier strongly indicates maliciousness.

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.link/wix?keyword=hitchhiker%2527+s+guide+original+cast
    • https://cdn.shopify.com/s/files/1/0434/9689/8724/files/american_journey.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/98218772000.pdf
    • https://cdn.shopify.com/s/files/1/0439/1659/1272/files/faxuxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/57162429046.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/23693338100.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/42654296509.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/arbaeen_nawawi_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/nukuwisipegajogagedago.pdf
    • https://cdn.shopify.com/s/files/1/0457/8620/2278/files/diagrama_de_moeller.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/maharashtra_apartment_ownership_act_1970.pdf
    • https://static.usrfiles.com/ugd/90c678_d089936df08141bf89a1e3932065f30f.pdf
    • https://static.usrfiles.com/ugd/badafb_4dc0914412ed4abfab82e6a4ac8d168c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e97d1b49d85246f88f14ebaee3a5159f.pdf
    • https://static.usrfiles.com/ugd/0aab01_31d720e99802492495c8dd48e504f178.pdf
    • https://static.usrfiles.com/ugd/4dd980_6d0815bebb404c16a6bda0873781afdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_98a7132ed7234b72bab264bd7715e189.pdf
    • https://static.usrfiles.com/ugd/e78b77_5359fcf003ac4f03b667d5845ff435f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2310afeaac745869d814c728603b873.pdf
    • https://static.usrfiles.com/ugd/bf650e_6941c63d452a4baf948ed9c9909c4bd6.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b525.bin
1445c213df59b77cf252d9ff96dfa0115fc3bb7324415a8f86bbe98cbe9abd2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB525 5260 bytes
font_01_sfnt_off0000c701.bin
edefafc6f4ee7780d6d31da81a1f06ba38b31e076bd344e4a62ba65f0d688a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC701 10592 bytes

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