Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efa19479260d4ea…

MALICIOUS

PDF

45.5 KB Created: 2020-08-31 23:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 935b188c29c934e10e4f5bcc48a37b2e SHA-1: 76cbaf8361ae908b479cb21a8361dd81a41fb123 SHA-256: 9efa19479260d4ea1c34968605b719dc104261090d3bfdce84692b012b9f34fb
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, disguised as sheet music. This suggests a social engineering attack aimed at delivering malware. The PDF also contains a large number of links to other PDFs, indicating a potential link farm or SEO poisoning tactic. No scripts were extracted, but the primary malicious indicator is the redirector URL.

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.ru/wix?keyword=concierto+de+aranjuez+miles+davis+sheet+music
    • https://static.usrfiles.com/ugd/7f16bd_b809d35b4ea64a5f8cd74edcf60dd161.pdf
    • https://static.usrfiles.com/ugd/b8c837_22753cedaa424edbbe5fa513a506f6e2.pdf
    • https://static.usrfiles.com/ugd/fd3290_56f50bc0980844eb80654d4650c6aef0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c50a24c852d4a6db51b6e68af37e579.pdf
    • https://static.usrfiles.com/ugd/80bfa9_54eb87b3896e4f11b5540ed04efd6dee.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/bundesliga_live_radio_app_android.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f08387929414aacb4b702e784f65a21.pdf
    • https://static.usrfiles.com/ugd/b8c837_57d564a4fd134b08b55684e92cca70d1.pdf
    • https://static.usrfiles.com/ugd/895bef_f12c509bd0b2412f97d6309d2fd4f986.pdf
    • https://static.usrfiles.com/ugd/9e14ca_8f86919ca6f3497a80683ca3271125ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c8b2143903642f8994781e8bcc85afc.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_off000063f6.bin
5cbd3e71705086a8ae8d52aea78793bcfaac9924c54576a904a090bfe2aaa74c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F6 5272 bytes
font_01_sfnt_off000075bd.bin
d4d9bcf82c8c853c38d4b07c380702229607f901d98f64ea26ba49363c8b1053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BD 10952 bytes
font_02_sfnt_off0000999e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x999E 4324 bytes

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