Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2ccf512afcec41…

MALICIOUS

PDF

43.6 KB Created: 2020-09-08 16:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 026fe8b336d03b4e47caba6600c0d654 SHA-1: 4708c98d9cf318ac5909bdc7cff44ba8fd6f5d56 SHA-256: ba2ccf512afcec41378679c99a843c8a00d84e53a4b5bdf8b28ab731f5678c67
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the primary links, 'https://ttraff.ru/wix?keyword=flatness+tolerance+for+aluminum+sheet', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and other Shopify links, suggesting a coordinated effort to lure users to potentially harmful sites.

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=flatness+tolerance+for+aluminum+sheet
    • https://cdn.shopify.com/s/files/1/0434/4152/0790/files/schma_de_l_appareil_respiratoire.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/48066003565.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2100/files/tigise.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/artisanal_fishing.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/35481506884.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/abide_with_me_vocal_solo_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/6776/7970/files/josiraruzotir.pdf
    • https://cdn.shopify.com/s/files/1/0461/9114/9214/files/46691653118.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/services_in_angular_js.pdf
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/24523882014.pdf
    • https://static.usrfiles.com/ugd/cc3ca9_5119a980fdc94b78a60ae71139cb7528.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf155e1798dc4d58ad38a62e6c9f8df3.pdf
    • https://static.usrfiles.com/ugd/90c678_34780f16574c46fe9c3d9489bd21d5e0.pdf
    • https://static.usrfiles.com/ugd/29c71c_ea17ad2e990a4fa28e250555ac3211fa.pdf
    • https://static.usrfiles.com/ugd/957c7b_c1768632fed648048ddf3be1045b1b46.pdf
    • https://static.usrfiles.com/ugd/943725_bdae890632d84d11bfbc65e0c1b748de.pdf
    • https://static.usrfiles.com/ugd/857e61_47c5dae0db5f4b13ab8c2a6ee56ff45e.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_off00006c7e.bin
d88de6a5dba36a66735abb933d910c173959352f80bd13d97e11110ee40e617f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7E 5076 bytes
font_01_sfnt_off00007d98.bin
d78ba133f81a530b543b92b25e3dda4f181d884bf16efa02e68aea747c4d9135
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D98 10536 bytes