Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3dd83a3300c9c1…

MALICIOUS

PDF

86.2 KB Created: 2020-08-01 14:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 158898f853b50866c0418e0604f58bfa SHA-1: 815cf270aef572a08c72c5a2b694d847061eb2d4 SHA-256: 4f3dd83a3300c9c1368d804df51cc6b6bb25b378c493f240dd14668bf6e8b59c
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is further contextualized by the document body mentioning 'Steam client console commands'. The presence of a large number of external PDF links suggests a link farm for SEO poisoning or traffic redirection. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be part of a multi-stage attack, potentially requiring a password to access a subsequent payload.

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.ru/pify?keyword=steam+client+console+commands
    • http://files.dlogiceu.com/uploads/1/3/1/4/131437376/vodozaxufu-vesurasud.pdf
    • http://files.lastarterseries.com/uploads/1/3/2/7/132741764/durosuxodo.pdf
    • http://files.cowboycookinwickenburg.com/uploads/1/3/1/4/131408798/8478c.pdf
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.pdf
    • https://cdn.shopify.com/s/files/1/0429/4161/2199/files/20852402101.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8349/files/wakaxukixedunibiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/serebixikati.pdf
    • https://cdn.shopify.com/s/files/1/0431/9074/7295/files/lepajaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/tilobojota.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/wukab.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/40280347928.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/55559583077.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/dedikiwaba.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/8050439347.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/tizipalamasapab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.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_off00010615.bin
47bacbd6cca5e75c77f8f5f394ac160e245cc9bd8c2ac49e35389c9102330980
pdf-font-stream PDF embedded font (sfnt) at offset 0x10615 5092 bytes
font_01_sfnt_off00011752.bin
a4718ad664763b0c44334684690c90fd3e210682be6140474b732424c36cc7ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x11752 16820 bytes