Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c87177f1ddbfc5…

MALICIOUS

PDF

55.9 KB Created: 2020-08-28 23:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac755adf84a7f54a5b639e879b8b196e SHA-1: b931a709567b7cc49a24e0489fe8cd7638b25d39 SHA-256: f0c87177f1ddbfc56b2ebf4697109e582d20744f020727ff17020cd2a2513ffd
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.cc', which is flagged as malicious. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be social engineering via a deceptive link within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=circuit+de+la+r%2525C3%2525A9compense
    • https://static.usrfiles.com/ugd/b8c837_e7db4e5df721457397b4970c38ae0436.pdf
    • https://static.usrfiles.com/ugd/b8c837_af9f47ef1d0647a697260afccf296c92.pdf
    • https://static.usrfiles.com/ugd/b8c837_b71178487f704287a6a27ae5abc15c90.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0057/files/831246708.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/11571800691.pdf
    • https://cdn.shopify.com/s/files/1/0433/3466/4347/files/sugex.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/81423302666.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5201/files/87923347665.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef332902125d44f09dab24f6d572cbe8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f99bd3d67a4b4b1f82edcba6edde4e40.pdf
    • https://static.usrfiles.com/ugd/b8c837_16064dedc23c41148a2f399905ceec76.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cdca71efa4d420dae24df829404ce47.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dae9b710cb74eef81b00a83a76f1166.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea41ad8af7544b85a84fa16b69343393.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdcfd85f4cf94ac19686e48e7022ee2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_344c2116375244afbd20eac82e2cce46.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22341427f8f4d27855f576d3dc0180f.pdf
    • https://static.usrfiles.com/ugd/b8c837_82c4394a3f19487da9638d2a4cc288e7.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_off00008d47.bin
d3b669caafe7c8e7f1b19d19ccb700028e6704094870643072af1c4f538886d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D47 5268 bytes
font_01_sfnt_off00009ec2.bin
ae0b089ccc5c2993d97d8a30a4ea52923a2c5e09c3f060189363825afcaca6c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC2 10964 bytes
font_02_sfnt_off0000c2a5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A5 4324 bytes