Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4de42b169406a0f…

MALICIOUS

PDF

49.9 KB Created: 2020-08-30 07:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61e79beebe8c65678606c0214ff4b9b8 SHA-1: 05edbc047d984cb6a7dc38febebec0db3134b3fc SHA-256: a4de42b169406a0f52ead14b0f1c3022f57315e438bdcf2116ded5461a0b3765
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to a 'Hamilton beach breakfast sandwich maker manual' and the malicious URL itself, suggesting a lure to trick users into clicking the link. The file also exhibits characteristics of a PDF link farm, with numerous links to static.usrfiles.com, likely for SEO manipulation to improve the ranking of the malicious redirector.

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.com/wix?keyword=hamilton+beach+breakfast+sandwich+maker+manual
    • https://static.usrfiles.com/ugd/8acad3_d77ae02c57c741178014633828b30e79.pdf
    • https://static.usrfiles.com/ugd/b8c837_e21ac01d42b1456f88727182eb37006b.pdf
    • https://static.usrfiles.com/ugd/b8c837_17772981c6da43f3936d302466e8daf8.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_5464d71d045441d2adc856c6b6782afc.pdf
    • https://static.usrfiles.com/ugd/e2c250_57f395e38cc7473496196bd9d31fb75f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cd7c6f759414728b88bf5d9b3262b65.pdf
    • https://static.usrfiles.com/ugd/79cb75_3441450c476145a49bb6f81384e74e96.pdf
    • https://static.usrfiles.com/ugd/accd1f_9bc0d15afe924929990c3e108c9d1c65.pdf
    • https://static.usrfiles.com/ugd/b8c837_20cc7e4667424dc59be3dfd229417251.pdf
    • https://static.usrfiles.com/ugd/1e32c2_30a0ee00e6ad476692f2c8a5dfa7763d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6354e190b664a148bc5c68eb631d4ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d9ffaeceb504c518a6638ab40a23277.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ccfee43798348d884f3d93ebe55a7a2.pdf
    • https://static.usrfiles.com/ugd/8de238_c04984370bf340c8982c4b5a7f96747b.pdf
    • https://static.usrfiles.com/ugd/a771bd_b45bbfc91f6d44279e543a446bef78b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_efc3a2a58ac94b36bb8b3bdd4e5be681.pdf
    • https://static.usrfiles.com/ugd/a1fb72_033d20e6f5dc4ec98982f71a49dd1762.pdf
    • https://static.usrfiles.com/ugd/b8c837_7591dcc17de04f69aac1113b6b9d1fc8.pdf
    • https://static.usrfiles.com/ugd/122077_ed53e6c7d8244a7293a9e6d6a0120f54.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_off00006e90.bin
119ea4f1f92eb815b68746080fd594d0831ffd18a155df0cfa7df19b60e393ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 5520 bytes
font_01_sfnt_off0000812a.bin
c2ea7fa564fc1ea8e0932b70f0d05f42ed1044df7892862d93c551a80d3ed285
pdf-font-stream PDF embedded font (sfnt) at offset 0x812A 10308 bytes
font_02_sfnt_off0000a41a.bin
d1a4c78ef556d8252eaaeead95fd6e0540edb04596780bf3770e55fda0b1f776
pdf-font-stream PDF embedded font (sfnt) at offset 0xA41A 16196 bytes