Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f21922c8250942e…

MALICIOUS

PDF

39.4 KB Created: 2020-09-04 08:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dc6bfda19b8a1112f78efadda883b72 SHA-1: 4ebbd39605377e8c84c0fc7b87669e9f8d4b2123 SHA-256: 0f21922c8250942ee8d736dcce2812bfd388ccacfccf60ae7472fa2926917cfb
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links, https://ttraff.ru/wix?keyword=bagheli+bhajan+video, is flagged as a known malicious redirector. The document's structure and the presence of a malicious redirector indicate an attempt to lead users to harmful content, likely for phishing or malware distribution.

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=bagheli+bhajan+video
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0c4177_2cc6d7f24fcb436787bb44c3b4d71941.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd6c8e0a3cb7448b9d2ccae6fdfe30c9.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_9ec1c7b3f6894413acb2b2ffa048d0f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffb9a4596e70430c8c666932c403267b.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/aeronautical_chart_user_guide_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/3366/3400/files/hewlett_packardhp_laserjet_p1505_driver.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/poxotijebolasi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/abc_physics_book_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8711/files/balaghat_ka_tura_audio_song.pdf
    • https://static.usrfiles.com/ugd/9b5f63_8631aa07114c452da336eb216bae499a.pdf
    • https://static.usrfiles.com/ugd/50988c_183be96e489d442db4da60f9a02349fa.pdf
    • https://static.usrfiles.com/ugd/c7a620_10dc1ba569c34d8d9f6d527d240bf2a8.pdf
    • https://static.usrfiles.com/ugd/a8cc01_67c4ef238ca04b7a820e464bafaa9261.pdf
    • https://static.usrfiles.com/ugd/4479ed_6b924fd08c4848408f782f659a262f3e.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1829/files/atkins_40_acceptable_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/0689/3985/files/deluxe_badass_combustor.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_off00005576.bin
1309e742f3e30febdbe22d7cb345e110402f97ee6af8ca38501640adf3bdb5c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5576 5140 bytes
font_01_sfnt_off000066fd.bin
c19919d1abc809ede6a9f84c92ad1c2d9c6e2ac6ccd44bdf7d511e7db1ac211e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FD 13012 bytes

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