Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5466c3d6d53050…

MALICIOUS

PDF

50.5 KB Created: 2020-08-21 01:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba85e8d7e487da6b3891d3bfb465bbb8 SHA-1: 984b4f65059091b3bee8436f480d5039142cc18a SHA-256: ae5466c3d6d530508ae743a3639154415c5cffd6f1ff7b4127d374f2a9c37b72
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=buy+railway+platform+ticket+online'. The document body also contains this URL, suggesting a social engineering lure related to purchasing railway tickets. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=buy+railway+platform+ticket+online
    • http://zagidi.archivedsanfrancisco.com/uploads/1/3/1/0/131070493/1248407.pdf
    • http://fukor.pouredcandle.com/uploads/1/3/2/6/132681393/73c46b8225.pdf
    • http://files.thekissroom.com/uploads/1/3/1/4/131452867/72e2c29979fa.pdf
    • http://files.crawfordphoto.org/uploads/1/3/1/8/131856476/rululozoxeg-wamosaje-kirono-xubeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/zazizobo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5880/7455/files/72126345400.pdf
    • https://cdn.shopify.com/s/files/1/0437/7935/8869/files/carnatic_music_notes_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/materi_belajar_bahasa_korea.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/41817312905.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1853/files/kevin_gates_excuse_me_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/fundamentals_of_logic_design_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/hazardous_materials_technician_1st_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/99754736530.pdf
    • https://cdn.shopify.com/s/files/1/0437/0166/5960/files/3442807511.pdf
    • https://cdn.shopify.com/s/files/1/0428/9265/6799/files/33527067528.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e5.bin
38b24d9691bf1da05907faa8fa7d5790798c27e916aeb019111ac6fe7bb7376a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E5 4272 bytes
font_01_sfnt_off000070e8.bin
882278223a30bfa45b7b9d10bb145930bbdaba2b54af5c82e17c5ecce90b0fe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E8 5292 bytes
font_02_sfnt_off000082ec.bin
eb923b2b61d3a9322fbba452750f4d1b189c696d5cea26e098bddc7021c19565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82EC 10512 bytes
font_03_sfnt_off0000a71c.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71C 16164 bytes

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