Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a18c2597be1edca…

MALICIOUS

PDF

52.9 KB Created: 2020-08-11 20:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a04782072a59d84eeab785dcdcc1b9b6 SHA-1: b49ee99b7d40a28777ed2a64dec6d40db581dff5 SHA-256: 8a18c2597be1edca42b0019fcf4c2a747632d59bdb41704de08f607f8c1ef7ea
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=anthony+bourdain+typhoid+mary+pdf'. This indicates the document's primary purpose is to lure the user to a malicious site. The presence of numerous other PDF links, many hosted on potentially compromised or disposable domains, further supports this. No scripts were extracted, but the embedded URL is sufficient evidence of a redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=anthony+bourdain+typhoid+mary+pdf
    • http://files.shimfarmtour.com/uploads/1/3/0/8/130873872/3f05cc70e7f508.pdf
    • http://vapoxe.yassvalleycruisers.com/uploads/1/3/2/6/132681670/fb3df293d.pdf
    • http://zabitowuf.ohiooutdoorstructures.com/uploads/1/3/1/6/131606490/sijusupogepokupo.pdf
    • http://wuvisefig.worldofhello.org/uploads/1/3/1/6/131637881/23cd887e625373c.pdf
    • http://files.mrsararadian.com/uploads/1/3/1/4/131453676/725d0ad5d8b20d.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/rifts_game_master_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/fuwebobokumumavidezemi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/rerarovesag.pdf
    • https://cdn.shopify.com/s/files/1/0430/1452/0995/files/35757491117.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/zobevumutenexuwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/carbohidratos_polisacaridos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8374/files/7173389178.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0431/9500/7137/files/zinigesu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/14102353519.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/raspberry_pi_bluetooth_python.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_off0000843a.bin
5691713d6360ebf11ee99036a652a29a5433776f136e0ae57c049a7c9e58459e
pdf-font-stream PDF embedded font (sfnt) at offset 0x843A 5064 bytes
font_01_sfnt_off0000953a.bin
b557ff6aa6bed53c798ce308dc042ff5f0bdc97a421f5575a1b24704e0be1e29
pdf-font-stream PDF embedded font (sfnt) at offset 0x953A 10316 bytes
font_02_sfnt_off0000b863.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB863 4324 bytes