Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0555a817315433a…

MALICIOUS

PDF

41.5 KB Created: 2020-09-13 16:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 015116197a76ef746a78e58899e0cb4a SHA-1: ffa74c9e9a4ae95512e609d36cae05d2374aa4f7 SHA-256: f0555a817315433a9c20b273f78ecc99a90d21cfd338aad756c3a873fb386585
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a malicious redirector. The document body, though malformed, contains text related to a 'Samsung cell phone extender manual' and includes the malicious URL, suggesting a lure for users seeking information. The presence of a link farm further supports the attack pattern of directing users to potentially harmful sites.

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/pify?keyword=samsung+cell+phone+extender+manual
    • http://files.cattlekinginn.com/uploads/1/3/0/9/130969695/govojunizos.pdf
    • http://lenojelu.bearsportswear.co.uk/uploads/1/3/0/8/130874493/wipaluxo.pdf
    • http://files.shadylanefarm.store/uploads/1/3/1/4/131437953/materef-raxawubilosabik.pdf
    • http://files.herveybayorchidsociety.com/uploads/1/3/0/7/130739802/vatijedevaz-tumopewerusod.pdf
    • http://files.charleybearproductions.com/uploads/1/3/1/3/131380786/4888295.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7800/files/67697106419.pdf
    • https://cdn.shopify.com/s/files/1/0437/5619/1893/files/spreadsheet_software_ms_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1110/files/craftsman_179cc_snowblower_manual.pdf
    • https://static.usrfiles.com/ugd/4c7633_17b8893de24b4aa1a9d177c93ef1fadc.pdf
    • https://static.usrfiles.com/ugd/d13e1f_b100c36934064bc2810f57c8ddb0279e.pdf
    • https://static.usrfiles.com/ugd/85d67f_25772212925f442e930466e476a0526d.pdf
    • https://static.usrfiles.com/ugd/c2007e_1b3621c7f178412f9f3c4a30bbc1010e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5275b60d53e04940a0f0ca0851ebc307.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_8f41bba717544cfc86a9a8ce294b0076.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_off00006348.bin
3b93ed2450760f7932b5fdfe3e295a24ad1cd2cd48521e581d60ff0c8a197a5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 5656 bytes
font_01_sfnt_off00007665.bin
a5c6931353bddf7da304fecfe22533c57608df02f16a6614ae166130e9baf885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7665 10468 bytes

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