Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26634d456f6afdb…

MALICIOUS

PDF

35.8 KB Created: 2020-08-25 04:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9405381998a6cd2beb599f03622bb32 SHA-1: 962f3ca99f85b69feabc65841639dab0f30f8b2c SHA-256: d26634d456f6afdb63c46f3dac20b91199088b4383cc1940685b352f0688107a
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially corrupted, suggests a lure related to a 'camera shots quiz answer sheet'. The primary malicious URL identified is https://ttraff.ru/pify?keyword=camera+shots+quiz+answer+sheet, which is likely used to deliver a secondary payload or redirect to a phishing site. The PDF_SEO_LINK_FARM heuristic also indicates a large number of outbound links, many hosted on Shopify, potentially for SEO manipulation or to obscure the malicious redirector.

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.ru/pify?keyword=camera+shots+quiz+answer+sheet
    • http://files.jcexteriorscontractor.com/uploads/1/3/0/8/130814717/796059b9195067e.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2375/files/puvepomepesemugat.pdf
    • https://cdn.shopify.com/s/files/1/0435/2383/4011/files/zalilaxevolebovatek.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/aashiqui_mein_teri_new_song_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/cengage_physics_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0436/8682/2053/files/povomalikezo.pdf
    • https://cdn.shopify.com/s/files/1/0462/6746/5890/files/baumatic_fridge_freezer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/8101/3150/files/69423005075.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8661/files/juxezisepevifirovuted.pdf
    • https://cdn.shopify.com/s/files/1/0434/8051/4726/files/93221778886.pdf
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/allman_brothers_jessica_piano_sheet_music_free.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_off00004446.bin
b520ad644d61428d840846ce116280639285cf2325a0eeb4cc8b87aa76fc8bf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4446 5064 bytes
font_01_sfnt_off00005577.bin
1a8881801ed5ef0b19f2f0c2c541608f352a4a15e691f9e8a4e9832b2ab2cdcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5577 9080 bytes
font_02_sfnt_off00007474.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7474 4324 bytes