Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59fc79b1e749599…

MALICIOUS

PDF

40.6 KB Created: 2020-08-07 04:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67a66356055b1a24b244ff96adb07d0e SHA-1: e98724c9fca27ddb40d3652106d9a8adf6de88a9 SHA-256: d59fc79b1e74959955ca0c6fe8bdcad5d2fdd093f0aa11ee50bc771b49f1f5e5
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=calculus+b+v+ramana+pdf'. This link is presented within the document body, disguised as a legitimate PDF download. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The primary malicious URL is the most critical IOC.

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=calculus+b+v+ramana+pdf
    • http://files.kushifarm.com/uploads/1/3/1/3/131381991/1595e7aaa05f69f.pdf
    • http://files.reallifetv.life/uploads/1/3/0/7/130739275/6194954.pdf
    • http://files.drnataschasantos.com/uploads/1/3/1/8/131871477/4ea8755ca6dce.pdf
    • http://files.destyinvestments.com/uploads/1/3/1/4/131437363/bumomojazujok.pdf
    • http://files.gogovernors.com/uploads/1/3/1/4/131406762/6528224.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/xajofudafubuxupigevufi.pdf
    • https://cdn.shopify.com/s/files/1/0444/3491/5495/files/upsc_cds_eligibility.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/norasefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/10511092646.pdf
    • https://cdn.shopify.com/s/files/1/0430/7589/5450/files/61815382192.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/98147337816.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/surotojovaminevukojunonap.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7109/files/sosekeraladewatapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2121/3591/files/27446296589.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/vewej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005404.bin
be4c0eaf72a205e4c82e6cf55c369c78f686a1dfdf96ca01067a9390f3908c34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5404 5052 bytes
font_01_sfnt_off00006506.bin
a0be20e3c3f7f384666bf09c9d4e2ac012a4c911c95453bfa3be84f0df859c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 10024 bytes
font_02_sfnt_off0000875c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875C 4324 bytes

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