Malicious PDF — malware analysis report

Static analysis result for SHA-256 84de8cb32a039721…

MALICIOUS

PDF

44.5 KB Created: 2020-07-28 05:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d34efcbbd2d578033c2028b59ee4ed3 SHA-1: d2c7f6668ccda60cc8bce4eaa3ee26c4278b0326 SHA-256: 84de8cb32a03972116bbae0b3291d65af31dd0d768d5057cc072fe00c8b59d29
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning. One critical heuristic indicates a direct link to a known malicious redirector, 'ttraff.cc', which is disguised as a free antivirus download. The document also provides instructions for a password-protected archive, a common tactic to bypass gateway security. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious URL.

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.
  • 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
  • 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/pify?keyword=antivirus+avast+free++2015
    • http://files.ventana-abierta.es/uploads/1/3/2/8/132814022/vonaxusuwis_bevikabesafob.pdf
    • http://files.good-saint.com/uploads/1/3/0/7/130775368/weraxorogijile.pdf
    • http://files.greatdunham.org.uk/uploads/1/3/0/9/130969085/momas_vamirin_navadatike.pdf
    • http://files.sommerranchbordercollies.com/uploads/1/3/1/8/131857758/8282465.pdf
    • http://files.greatdunham.org.uk/uploads/1/3/0/9/130969085/momas_v
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/43533721596.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9642/files/gutukixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/24486069783.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/litepixaxogeniwireganer.pdf
    • https://cdn.shopify.com/s/files/1/0431/9562/9725/files/kukolajeximepiludej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/bazizufipuvigomofe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/posetetebekopow.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/4912058048.pdf
    • https://cdn.shopify.com/s/files/1/0437/6782/4533/files/puzovigurirasiwerozesuri.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/6109406999.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/54613417108.pdf
    • https://cdn.shopify.com/s/files/1/0435/6420/4193/files/94424174252.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_off00007192.bin
74143f6c8cd1048975d7379428a9743616dc193f8e4356e512be02e7f3a743f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7192 5000 bytes
font_01_sfnt_off000082a5.bin
6342b70281066d09eae4f4be3b477d7e9a1bb7a24beaa40deae73368f3a863d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x82A5 9952 bytes