Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c6b02fc8e130cc…

MALICIOUS

PDF

42.7 KB Created: 2020-08-31 23:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee59d4fa2517e00f99e2505d256c06e5 SHA-1: a6cc405154068e0c6caebc3f670c7547066aae63 SHA-256: e8c6b02fc8e130cc1d122178181176a58882e2a3443161640eee527d904592e9
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and references a 'cv template', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. 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.cc/pify?keyword=undergraduate+science+cv+template
    • https://cdn.shopify.com/s/files/1/0446/9909/1098/files/baggy_pants_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/chemistry_atomic_structure_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/1310/9920/files/english_grammar_exercises_for_ielts.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdf
    • https://static.usrfiles.com/ugd/921909_aab2124cdde0473e9521a3ebefad7ba0.pdf
    • https://static.usrfiles.com/ugd/576447_a4b4c9a943b44363a5274506e65cbc4d.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/kowapadavovewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/brother_anil_kumar_telugu_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0189/6347/files/dilirom.pdf
    • https://cdn.shopify.com/s/files/1/0461/9593/3347/files/redistricting_game_worksheet_answers.pdf
    • https://static.usrfiles.com/ugd/8b9728_d18e01d5ee3d45b598428e98735798fb.pdf
    • https://static.usrfiles.com/ugd/ecec20_8b7b930ea1a6447487e18d759fbc0654.pdf
    • https://static.usrfiles.com/ugd/b8c837_71bf78a1578d4de3b45a917ec929f602.pdf
    • https://static.usrfiles.com/ugd/8de238_ade707d23e4f492ba01da48f275f4f8e.pdf
    • https://static.usrfiles.com/ugd/cd79e3_b0cbc1cd40d34c50aa3635f3b6c3ee8d.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_off000067bd.bin
eccf5d104e96f829c05a2089628210b6eeed5b8b6543ff53652b2a6e549fab1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x67BD 5444 bytes
font_01_sfnt_off00007a36.bin
37bf7e5ea757ddf8e8608b26ed9396589b6771235202b9f94fd66fcda65e8e23
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A36 10416 bytes