Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b9aa4a0a369c1a…

MALICIOUS

PDF

69.2 KB Created: 2020-08-26 05:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf47a80119a8829f3d7a88dcf0ab0bbb SHA-1: 9f3261bfb1ecdd689421c8acca25dfec3c51c099 SHA-256: a1b9aa4a0a369c1aecb131dd8babfefa21b59fdf41d00ca46e7c8c7be87826ed
128 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. It also exhibits characteristics of a fake invoice or payment lure. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. The presence of numerous external PDF links, many hosted on shopify.com, suggests a link farm designed to obscure the ultimate destination or to appear as legitimate content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=ysrrythubarosa+gov+rbapp+reports+payment+status
    • http://dofibitab.southactorsguide.com/uploads/1/3/0/8/130873995/3568445.pdf
    • http://fopoju.flowersfromsarahsgarden.com/uploads/1/3/0/7/130739892/vopemuvofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/welorubemodeva.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/besulo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4349/4815/files/ceragon_ip_10_commissioning.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/graphene_optical_properties.pdf
    • https://cdn.shopify.com/s/files/1/0460/2911/1455/files/17936887785.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3533/files/enhancement_shaman_pvp_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8311/2341/files/abba_happy_new_year_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/87775334304.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f22.bin
33fe9347934a7b702044fccec5c4540ad7967176b1dd94488204aff9b2bf1d89
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F22 5464 bytes
font_01_sfnt_off0000819e.bin
c9f2b0a7fe7c9874960658a67c604b1609ef31f451f9afaf6ac6894b78387137
pdf-font-stream PDF embedded font (sfnt) at offset 0x819E 32248 bytes
font_02_sfnt_off0000c456.bin
852fa33cbf858e79f79c7176a7e8ccdf49cfdaa447a847ad786595812eaf729b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC456 10080 bytes
font_03_sfnt_off0000e708.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 16164 bytes
font_04_sfnt_off0000fc59.bin
413cae8dc8a887cac241d3de3758f3f3dc95ed0159125f697a1688b886dc5ab7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC59 2568 bytes