Malicious PDF — malware analysis report

Static analysis result for SHA-256 3943260b7bf20171…

MALICIOUS

PDF

45.4 KB Created: 2020-08-26 11:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e3c5c541a6458e6eb60612b5cccf5e2 SHA-1: 89759b478e7d60b1d67aa4db7b72cbb2ec095499 SHA-256: 3943260b7bf2017171229b1a179333aed4fe0839590982c7561a9066c0411cdb
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, under the guise of 'After effects 2d animation templates'. This indicates a phishing or redirection attempt. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=after+effects+2d+animation+templates
    • http://files.katoutofbag.com/uploads/1/3/1/8/131857419/9e2adbe122d40.pdf
    • http://files.crossandcoboutique.com/uploads/1/3/1/4/131452935/1051446.pdf
    • http://dumunot.theprospike.com/uploads/1/3/0/8/130874493/6a8aebf4ee7730.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/98217293845.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/90433757004.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/vezokogisegupogara.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7327/files/tebapatam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1845/2120/files/4246112685.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/kinetic_and_potential_energy_word_problems_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7495/files/niv_integrated_study_bible.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_off00007412.bin
8edd85e22d950ae0b83940352b2ea6d20ddbb33b680b763e30eca68407d186a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7412 5424 bytes
font_01_sfnt_off0000866c.bin
63b0e6723a740d0dac23fd81f040cf5d3095ad50738612fb17d296faa9cb166f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866C 10120 bytes

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