Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c08fa1e19c90153…

MALICIOUS

PDF

44.6 KB Created: 2020-08-08 11:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0bec5fdbcda5171e694eec0aa236dff SHA-1: 93fb442f60728aa89c5e436edb771b770664414f SHA-256: 9c08fa1e19c9015371a5d10430d2e0d29b3073812b08887270fb84f92bd6ec93
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users through deceptive content or SEO poisoning to click on malicious links, which likely leads to further compromise.

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=automobile+mechanics+book+pdf+download
    • http://files.backdoorfriendspurebredcatrescue.org/uploads/1/3/2/6/132695546/dujaf_lunekuwojoxewov_suwasaxuwewab.pdf
    • http://files.islamtoyhwh.com/uploads/1/3/2/6/132683330/detagakom.pdf
    • http://files.rebalancesudbury.com/uploads/1/3/2/6/132681392/potokozobajinopabov.pdf
    • http://files.renehindsarts.com/uploads/1/3/1/4/131437775/zaboduzevavivafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/94220731940.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/public_speaking_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/8973469042.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/vusekenuliladakepuvif.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5467/files/bidip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/40635932114.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/emergency_care_13th_edition_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/tedukegagovaluziv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/xekafaluwafuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/zepinemoneselopuzeno.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_off00005c0b.bin
b429fdd6bc8994e6119fd87658706a51b77e0670832f59621257de44b7928f90
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0B 5584 bytes
font_01_sfnt_off00006ee5.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE5 2116 bytes
font_02_sfnt_off000078af.bin
381c9bbbdfcc1b6ad58236cd21b1ea292f5eaf62c810a65b6b535c960b6a1043
pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 14384 bytes