Malicious PDF — malware analysis report

Static analysis result for SHA-256 9feec4192b6dfea5…

MALICIOUS

PDF

48.4 KB Created: 2020-08-20 22:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f37c98adec254aca504d77c19779d308 SHA-1: 24743a668a871b54fe35d3da58d24aa864cebc39 SHA-256: 9feec4192b6dfea5592e232fab325fa78bc4a65be1c923f1b14f573a2ff938f2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text referencing 'Christy moore discography' and includes URLs pointing to Shopify-hosted PDFs, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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/pify?keyword=christy+moore+discography
    • http://wabuz.umdfauxpaz.com/uploads/1/3/0/8/130874359/1834dcb38b.pdf
    • http://kukepub.rebeccaputman.com/uploads/1/3/1/4/131453574/sefuwupamexu.pdf
    • http://gobed.ghostsofdenton.com/uploads/1/3/2/6/132681394/5511390.pdf
    • http://files.musicfactorypromotions.com/uploads/1/3/2/6/132681579/vorazete.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kawovuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/chess_analysis_board_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/21262800317.pdf
    • https://cdn.shopify.com/s/files/1/0461/7076/7512/files/flower_crew_joseon_marriage_agency_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/65439774558.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/uttar_kand_ramayan_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/harper_biochemistry_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4040/files/supernatural_season_4_episode_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.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_off000071f2.bin
ed44f311e17aa6459d146d8ff377fd802ab870c6cf6b5a5deb89c79b86611a33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 5260 bytes
font_01_sfnt_off000083de.bin
8f085278896db148ec81b4256bb48b54495b0f8aee426b51f1e60e8b1e9957ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DE 10120 bytes
font_02_sfnt_off0000a685.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA685 4324 bytes

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