Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3bd8e239387112…

MALICIOUS

PDF

42.3 KB Created: 2020-08-09 23:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 998b558ff7305b6a314ce398783070c6 SHA-1: 6560051e9c9c439940c019a830f30890a6f207fe SHA-256: 2f3bd8e239387112d34bd7c8d198c88df24d91c811baf615656441818cb9b792
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, including a critical link to a known malicious redirector at 'ttraff.com'. The document body, though partially corrupted, contains text related to a PDF download lure and the malicious URL. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be SEO poisoning, directing users to a malicious site disguised as a free PDF download.

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.com/pify?keyword=la+cancion+de+nosotros+eduardo+galeano+pdf+gratis
    • http://files.bobodigitalmarketing.com/uploads/1/3/1/3/131380583/vemikota_manudageb.pdf
    • http://ralozi.fieldtripsdelivered.com/uploads/1/3/1/3/131398140/8729809.pdf
    • http://jazesosit.socialepistemologynetwork.com/uploads/1/3/1/6/131606407/putatovulidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/grados_maduracion_placentaria.pdf
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/33022102457.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/30248108529.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/97615417580.pdf
    • https://cdn.shopify.com/s/files/1/0429/0245/4428/files/36202343100.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/beckman_oral_motor_stretches.pdf
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/madulopa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1003/8683/files/battlestar_galactica_watch_order.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/java_basic_concepts_for_interview.pdf
    • https://cdn.shopify.com/s/files/1/0439/9199/0430/files/30914008262.pdf
    • https://cdn.shopify.com/s/files/1/0437/8682/9981/files/mobile_money_services.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_off000064ad.bin
004f36263c12d08a7715a0d8b4d9554d90a30701385113118e8b9bcb735d283d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AD 5264 bytes
font_01_sfnt_off000076a5.bin
5a921bc04d5194208425b6a78a1c2b49e94f664171cb4c8d38cabf9d7643f49b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A5 11368 bytes

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