Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b1563f92fa39af…

MALICIOUS

PDF

41.9 KB Created: 2020-08-25 03:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4cb638a9fad3b97ad3a732e4e895f9e SHA-1: 44d8b63adccfb4be124a04a38a1cd55e9b1e6a02 SHA-256: 86b1563f92fa39afe37ba79a7d7864d10c77cafa2b552895635a8e6ee063d278
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a resource for an 'Armenian keyboard for android tablet'. The document also features a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=armenian+keyboard+for+android+tablet
    • http://files.hardemanschool.com/uploads/1/3/0/7/130739783/vigofowa.pdf
    • http://files.cornerpostcowboychurch.com/uploads/1/3/1/4/131438718/eabd7baf1756.pdf
    • http://files.upperteesdale.org/uploads/1/3/1/3/131384442/63e98a83bcf.pdf
    • http://gunegolof.mendedwingtheatre.com/uploads/1/3/2/6/132683014/dowuguvogigodowenapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/2017_school_pronouncer_guide.pdf
    • https://cdn.shopify.com/s/files/1/0457/8384/2982/files/7429817579.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5498/files/dj_shadow_sixdays.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/renewable_energy_systems_advanced_conversion_technologies_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/91243413804.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2086/files/life_cycle_of_bacteriophage.pdf
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/poulan_weed_eater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/align_right_large_cabinet_hardware_installation_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/71094706468.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006575.bin
43c852fcd730670d2117d01c00d1fb8eec9cdc2dfea5a122a21c8df580b274c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6575 5168 bytes
font_01_sfnt_off000076f3.bin
2655a01d06ab48e653c182db4410a9a59e4b22d8342e5855816642d8f5a9f1c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F3 10520 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.