Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6432fe2bc1f39cb…

MALICIOUS

PDF

41.3 KB Created: 2020-09-08 09:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41e9a38c19e744f5464187fc5c20d3f3 SHA-1: 99de626516d6a7782f9ed356857891c7ce723268 SHA-256: a6432fe2bc1f39cb22e143368760c286c92b88a6a6866c4a6a79cd7748faa2db
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, which points to `https://ttraff.club/wix?keyword=cessna+t303+maintenance+manual`. This URL is presented within the document body, disguised as a Cessna maintenance manual, to entice users to click it. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. No scripts were extracted from this sample.

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.club/wix?keyword=cessna+t303+maintenance+manual
    • https://static.usrfiles.com/ugd/33c377_6c690d68b15349f38b4c2b0a5dcd320b.pdf
    • https://static.usrfiles.com/ugd/6a7407_34380bdd6c6344bcb346cc4976e55151.pdf
    • https://static.usrfiles.com/ugd/e73fea_be4911deaffd42f9aa76926c79bb696d.pdf
    • https://static.usrfiles.com/ugd/110ef3_5b8b2751a0614a2eb1d0f90c9175123a.pdf
    • https://static.usrfiles.com/ugd/121e37_ba59f723b69344ed9c6e06aaae858672.pdf
    • https://cdn.shopify.com/s/files/1/0440/5500/3286/files/b._ed_entrance_exam_form_online_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/77930002522.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/suzizadegirosete.pdf
    • https://static.usrfiles.com/ugd/fef806_65381b2a13044416aae57cbfadffd80d.pdf
    • https://static.usrfiles.com/ugd/430cb2_e640f5e4db564bceafebdb7d1ea1cf8c.pdf
    • https://static.usrfiles.com/ugd/2e16aa_3c028887d85448949cbddf2ff5d9cb5d.pdf
    • https://static.usrfiles.com/ugd/fd30ac_1f6cecfb021a4d6283d3a2d74f433dfa.pdf
    • https://static.usrfiles.com/ugd/90423f_ecf0ae34c7e345bcba1d44decb630af2.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_off00005a0a.bin
1fb6f82ca01befe4ecbb98078bbe891b60fc6d9b24a2da642bf2760fd0856e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0A 4948 bytes
font_01_sfnt_off00006ac2.bin
f5576be8d5e7ccad5234ca4d05822502708bbec0eaa1b28bb7c65cb27a6cc33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC2 9348 bytes
font_02_sfnt_off00008a8d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8D 4324 bytes

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