Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77f770659cddcbe…

MALICIOUS

PDF

56.1 KB Created: 2020-09-01 01:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bfb87f2fb728ee0b77ef3a5ed74861c SHA-1: 380df8d338c2d5e02ce445dcebe70f63369fcd5d SHA-256: f77f770659cddcbed16aeebd56207fe33661b0bac8ccab00de7490a33c3168c8
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is presented as a 'Japanese auction sheet'. This indicates a phishing or scam attempt. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. The ML classifier 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.ru/wix?keyword=japanese+auction+sheet
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/97207853462.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/metaphysical_poetry_by_ts_eliot.pdf
    • https://cdn.shopify.com/s/files/1/0435/3707/2280/files/tri_wing_screw_driver.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/allianz_travel_claim_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6177/files/xiaomi_mi_a1_aggiornamento_android_p.pdf
    • https://cdn.shopify.com/s/files/1/0457/6591/8884/files/fipigazapuxanavub.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/sigokujemok.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/33489196258.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/gopro_hero_7_settings_guide.pdf
    • https://cdn.shopify.com/s/files/1/0463/3116/6881/files/sawenaziwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/78035743223.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_off000078de.bin
bba3853095aecffbc2b2761910751e5723f993894d33aa894ec2af2de9f97dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DE 5112 bytes
font_01_sfnt_off00008ab4.bin
1f73054fa4105d48f44b9fc23013e4b8004379aab49fa2658b85d938d0b2ba7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB4 4764 bytes
font_02_sfnt_off00009ad9.bin
23906edf9a79f09bd1fc1632fdfe52c8dab49e0e109ba580c1b74f58dca46100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD9 13500 bytes
font_03_sfnt_off0000c584.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC584 4324 bytes

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