Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a8389accbee5f6…

MALICIOUS

PDF

49.3 KB Created: 2020-08-31 21:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42789261ccc9acf555b5db5e4371ffc1 SHA-1: 2993413efdb490dd4c0de62e5eb7d72f23a9e3b5 SHA-256: 40a8389accbee5f659b44e0f2d7dbc1c27379e9c9ca9998209fced239c67be2c
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is presented with a keyword suggesting a software download. This indicates a phishing or malware distribution attempt. No scripts were extracted, but the presence of malicious redirector links is sufficient to infer the attack pattern.

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=adobe+photoshop+cs6+background
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/blockchain_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/bose_soundlink_ii_headphones_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/camisas_tipo_columbia_para_uniformes_guatemala.pdf
    • https://cdn.shopify.com/s/files/1/0435/6207/4261/files/51560164243.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/adverbs_of_quantity_in_french_worksheets.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cc0ab1077b84167a1418c46ceee8e45.pdf
    • https://static.usrfiles.com/ugd/cb5dea_fa05be5a75f4499586b7be2d9dc7e655.pdf
    • https://static.usrfiles.com/ugd/af0aa9_ee75d5c1a08d49bbab121561ae74ee47.pdf
    • https://static.usrfiles.com/ugd/0f1814_7611437ffa75487285a3b1d2b8c35d97.pdf
    • https://static.usrfiles.com/ugd/eed56f_2fe2d4cb3ad44f0d864e6ecfcb1c7fec.pdf
    • https://static.usrfiles.com/ugd/b8c837_f240f904d63b4e2a9bb4ad43d02fd65f.pdf
    • https://static.usrfiles.com/ugd/b8c837_984aba8673e94f28b01643f7eb643778.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/83494227849.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/netuwemo.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_off00006a41.bin
70635221a1aa7608468748219d9e07e88b5970a7b80e781400a5f488f34bf7e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A41 5648 bytes
font_01_sfnt_off00007d6f.bin
f44d880e4e24f3987d682db114a86b0e8b24e25d64b9b13fc35946b5c4aa30a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6F 10968 bytes
font_02_sfnt_off0000a2d4.bin
a4f616c8ed03231f927c8f6725ddfb6aed79ba1e9c0c9257d690ec40f184d4cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D4 16388 bytes

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