Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3e4e0c524369ac…

MALICIOUS

PDF

54.7 KB Created: 2020-08-30 03:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36b60952b1552f4b28eb648c3acf96dc SHA-1: e48fb04bdfba8d8637251ffba64ba83803fe665f SHA-256: ab3e4e0c524369ac5cd386322fda8b7dccaad1627fd28f09b4ec22688b5dc713
128 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 static.usrfiles.com, and one critical link to a known malicious redirector at ttraff.cc. The document body, though heavily obfuscated, contains references to 'battle for darkshore guide' and a URL that appears to be the same malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=battle+for+darkshore+guide
    • https://static.usrfiles.com/ugd/4c1554_671ffc96d03d4d70bfbe363166b3177f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6d535e08de14c388e95b2ff94021b16.pdf
    • https://static.usrfiles.com/ugd/20d83a_bc615b256eb04c5482421f6dee7ec849.pdf
    • https://static.usrfiles.com/ugd/73c254_6aa37ec0742b4f018d55d7930f9818fb.pdf
    • https://static.usrfiles.com/ugd/6f7357_011eefc82d8b4be2b4e661c6f6fac8bd.pdf
    • https://cdn.shopify.com/s/files/1/0435/8642/0891/files/algorithms_and_data_structures.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/dapesukevofekexewavu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/fikuvub.pdf
    • https://static.usrfiles.com/ugd/67e251_b0376f06fd10455e91fe9fa793d66c07.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_b0c8317f960b4feca36f4db43a9dc8c4.pdf
    • https://static.usrfiles.com/ugd/3f80ec_da6d14a637e04930bfef1e2f608ba917.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_22c58b7bdd224636b0b5130f8873fbeb.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_off00008908.bin
6d16b1e1de8e606574c334ef8416851d0e05990235391d2b6b9d9ab4526d0e39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8908 5056 bytes
font_01_sfnt_off00009a53.bin
7daf296ec2e1580c4c1d454074810572b2070c0e6f9a94103b1ae68cb1c48a7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A53 10516 bytes
font_02_sfnt_off0000be15.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE15 4324 bytes

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