Malicious PDF — malware analysis report

Static analysis result for SHA-256 403679bdcd26be4c…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 05:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5320aa738429aad366a8e048d893f02 SHA-1: 45bc45c46ffe87e97e120f5c3f203e80915a48d4 SHA-256: 403679bdcd26be4c0e3da9b27ddef17b4e85867a87ede8f65032b6ae21ba5cd5
150 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links. One of these links points to a known malicious redirector, ttraff.cc, which is likely used to direct users to further malicious content. The document body contains garbled text but also includes the malicious URL and several other URLs hosted on cdn.shopify.com, suggesting a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=twisted+pair+neil+breen+download
    • https://cdn.shopify.com/s/files/1/0457/4117/9036/files/cds_2_2019_answer_key_official_website.pdf
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/trust_deed_format.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/citta_bula.pdf
    • https://cdn.shopify.com/s/files/1/0433/4105/4111/files/alif_novel_episode_11_download_free.pdf
    • https://static.usrfiles.com/ugd/1f2646_bbf1e5c2b6364394a31c3d88f41d3742.pdf
    • https://static.usrfiles.com/ugd/b8c837_afbed24747424c868d89aeb25c9ee842.pdf
    • https://static.usrfiles.com/ugd/ddb60a_b6bb347767664be2bafae883251c368b.pdf
    • https://static.usrfiles.com/ugd/b58d21_408fd3c0a196421aae0be45e7102003b.pdf
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/autenticos_decadentes_tu_forma_de_ser.pdf
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/safoterisodifamar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/bekibumijidesubidivugol.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_off000074b3.bin
15dd186e36b648acb3f22dfc98f3854b63f99ad3976d25bfc76c80434a9cd3bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B3 5136 bytes
font_01_sfnt_off0000863d.bin
7f6164b76f8f1191e909251acc75cea844afca304e091e1c591acfc79e711b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x863D 10472 bytes

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