Malicious PDF — malware analysis report

Static analysis result for SHA-256 d910fc79985a10e0…

MALICIOUS

PDF

44.8 KB Created: 2020-09-09 11:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b01112f01955fecbce0255c82d48ee65 SHA-1: 281b31620f4c73027a072179d55a1057673ce541 SHA-256: d910fc79985a10e05cb621c69b663a836249ba4feb2184af167e35cb4df840ba
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to lure users with the promise of 'campus placement papers'. This link is the primary indicator of malicious intent. The PDF also contains a large number of other links, many of which are benign Shopify URLs, suggesting a possible SEO-based link farm or obfuscation technique. No scripts were extracted, and the document body is heavily obfuscated.

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.club/wix?keyword=campus+placement+papers+pdf
    • https://cdn.shopify.com/s/files/1/0461/9799/7721/files/92537979059.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/adelaide_united_former_players.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6645/files/dufed.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/83115738557.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/jerubadanopuxanok.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/grudem_systematic_theology.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/rofoxalipudixodamawupasur.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/castlevania_anniversary_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/1401698892.pdf
    • https://static.usrfiles.com/ugd/ce5d00_e06ee5166ee24ed5aa1c4f8dcd298798.pdf
    • https://static.usrfiles.com/ugd/027f51_6e9d19c9957e4f198ee4a98bf7b16f61.pdf
    • https://static.usrfiles.com/ugd/3a38e0_f63f25914cb7416ea6f00c1193d851ed.pdf
    • https://static.usrfiles.com/ugd/3f0e57_d46dfbe96e5d4ec4baa70d3e9ace4044.pdf
    • https://static.usrfiles.com/ugd/b8c837_d387e0ed889c4da19f37f4ee07faba37.pdf
    • https://static.usrfiles.com/ugd/8ba634_d68c3b02f77148ff8a64ede5f21d880d.pdf
    • https://static.usrfiles.com/ugd/b0cb2d_72183740f16844e2b39e346c135c2e90.pdf
    • https://static.usrfiles.com/ugd/a374b9_0f0eedeb873d417996473c5d8371ec19.pdf
    • https://static.usrfiles.com/ugd/fbccce_6159cb46d68c48deb935a02b862caf82.pdf
    • https://static.usrfiles.com/ugd/ccf397_1a80b4fc26494ceca5366e97aa4e77f5.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/
    • https://static.usrfiles.com/ugd/ccf397_1a80b4fc2

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000659c.bin
5022c0a492930c1bb03909709fcdefb2efb87cf16c29b2d2125ae6b30d800428
pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 5208 bytes
font_01_sfnt_off0000772d.bin
72a3fe65f0a21df30f240897224061cfa351088b80a4eb601fb5defb198ec993
pdf-font-stream PDF embedded font (sfnt) at offset 0x772D 2268 bytes
font_02_sfnt_off0000813f.bin
836e2f21ab5411142c9576a2eb5ebcac6e54fd3678963a536b5283f56ba8a40e
pdf-font-stream PDF embedded font (sfnt) at offset 0x813F 10740 bytes