Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9de41246f91f49…

MALICIOUS

PDF

41.4 KB Created: 2020-08-12 23:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 951e68a769e331605dacda4ae8f85314 SHA-1: 94bad74eb855f3f32c2c94de8ee8cec5f8608471 SHA-256: bc9de41246f91f49f3932abbdb984a9a0eeda86af78a34a82d82bb7860768587
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially garbled, contains text related to 'Vacuna sarampion y rubeola pdf' and the malicious URL, suggesting a lure to a scam or phishing page. The PDF_SEO_LINK_FARM heuristic further indicates the presence of numerous external links, likely part of a link farm to improve search engine ranking for malicious content.

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.cc/wb?keyword=vacuna%20sarampion%20y%20rubeola%20pdf
    • http://files.janetlblack.com/uploads/1/3/1/1/131163718/7763967.pdf
    • http://files.mswicketts6thgrade.com/uploads/1/3/1/6/131637219/kugumugusa.pdf
    • http://files.syclub.com/uploads/1/3/0/8/130813317/gavuz_xufimetabav.pdf
    • https://cdn.shopify.com/s/files/1/0432/3688/4642/files/vujirubapedesejakezug.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/22311445652.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/93819763100.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6571/files/carter_bandsaw_guides.pdf
    • https://cdn.shopify.com/s/files/1/0433/3302/5960/files/2_x_72_belt_grinder_plans.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/nidatumoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/57571122595.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/tiwijeriwosi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4011/files/mobugokuwojusamaniwuge.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/bozumogojixilixanete.pdf
    • https://cdn.shopify.com/s/files/1/0446/0855/3123/files/steam_voice_chat_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/kekebopifexobazo.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_off00006059.bin
aa13c1d4a28583a66e16e7c4b49140b619f178077f402c47fd10abc3ea241937		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6059 5508 bytes
font_01_sfnt_off000072fe.bin
3da8a1e4584e6cf498151a078d0600bc38eb9465a9c172c0ae239ec1e4118a84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FE 11132 bytes

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