Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e7e91607398338…

MALICIOUS

PDF

44.0 KB Created: 2020-08-31 19:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d048e2f4f7c8b624a02bb62eb96e01fc SHA-1: 83c222dc80762b039abb6a44f42428d54305ff39 SHA-256: f2e7e91607398338e2bcf473251cb7f98b42ad0206e245c0e7483a4ef080786c
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF SEO link farm, suggesting an attempt to distribute malicious content. The embedded URL, 'https://ttraff.cc/wix?keyword=autodesk+inventor+student', is likely the primary malicious payload delivery mechanism, disguised as a link related to Autodesk software.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=autodesk+inventor+student
    • https://static.usrfiles.com/ugd/b8c837_c970f4ca78c74065a324323e999182f0.pdf
    • https://static.usrfiles.com/ugd/bfbc46_750d0460daff4b758d4bcd96263ff646.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_fe1f76a95686460eb7471e45246117ff.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vonabubabosutogoxofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9279/5801/files/55773464465.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/muzino.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/wexidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/bolshevik_revolution_worksheet.pdf
    • https://static.usrfiles.com/ugd/913720_4d8e48b4bc3b47ac8fa9147c31b00b50.pdf
    • https://static.usrfiles.com/ugd/77941b_6c794da11ed44ef08e9c49fbe2025131.pdf
    • https://static.usrfiles.com/ugd/affb4a_4aa7edaeca7e495ca0c9b818361d2478.pdf
    • https://static.usrfiles.com/ugd/d01287_2b2aa72c0cda469ba0cd76d4c8894229.pdf
    • https://static.usrfiles.com/ugd/b8c837_26cbeba4ddf04da9969db20fa7e30476.pdf
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/vupafifabubezogor.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/myocardial_infarction_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/semipazibufagatavobamufi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/redanimipevate.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_off00006217.bin
efc273c41ad1e37b94448463b08a94cb01c0bc64a4d5d7b750fdba9d3db9a05e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6217 3936 bytes
font_01_sfnt_off00007042.bin
8e3acd19fa85dd8bbb055000df4c61ea1495503de8d5e847d6886e07028c9210
pdf-font-stream PDF embedded font (sfnt) at offset 0x7042 4688 bytes
font_02_sfnt_off00008048.bin
e84477d628367fcf22699f58d7d163518159247b0f09649037e170e4260945fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8048 10084 bytes