Malicious PDF — malware analysis report

Static analysis result for SHA-256 3febab81583a5a0d…

MALICIOUS

PDF

39.5 KB Created: 2020-08-29 16:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e950eefee82dd7066e23cb77065383c SHA-1: 8762b4d6fc77904cad0ac5290320a4af9c28b7c7 SHA-256: 3febab81583a5a0db6235ace593c7c6ecfd82e05462143b04746ab53e7666704
168 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a lure for 'Fusion 360 download'. The document also contains a high-severity heuristic for a password-protected archive lure, suggesting the PDF itself is a delivery mechanism for a subsequent stage. The presence of numerous embedded links, many pointing to benign Shopify domains, indicates a link farm strategy to obscure the malicious redirector. No scripts were extracted from this sample.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/wix?keyword=fusion+360+download
    • https://static.usrfiles.com/ugd/b8c837_7910ecf8492747a98f9ddf053568d30e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1de735b99164c6f92ee577e3a35e538.pdf
    • https://static.usrfiles.com/ugd/b8c837_254d8a0b7b6c44789f1ec6f834f21c83.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9643/files/65964394478.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/quantity_estimation_and_costing_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0457/3416/6694/files/cement_pipe_manufacturing_process.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/89765240941.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/nibejukomibov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24863128440.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8199/files/98125166669.pdf
    • https://cdn.shopify.com/s/files/1/0437/2987/9194/files/runevujomifeponuguzomumaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/rarak.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/18047556837.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005de0.bin
53ac3f7ff09e6166b5f73d5bbda4352077193ece48e151d03426982856a391a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE0 5232 bytes
font_01_sfnt_off00006fc7.bin
e666b12a86cd6468f834fbc0d9fd352653366bbedf91d1523baccd6b0f4dd9f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC7 9944 bytes