Malicious PDF — malware analysis report

Static analysis result for SHA-256 36180c36f6bc9a36…

MALICIOUS

PDF

52.2 KB Created: 2020-08-15 14:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4ffe1e32423e9a22c2402638cba2676 SHA-1: c98392f7f962426fcef5c2759c4098bb808e7586 SHA-256: 36180c36f6bc9a369f4441bdb53c6ccecbb05662c913d659bbe5b58f26b77d45
150 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Bollywood movies' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=bollywood+movies++sites+in+hd
    • http://files.mckenziesinfinity.com/uploads/1/3/0/7/130776208/vasagigexuga.pdf
    • http://files.cobilconnect.com/uploads/1/3/0/9/130969853/6ea8d66a.pdf
    • https://cdn.shopify.com/s/files/1/0433/9551/4535/files/after_2_french.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/lovusizokafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2680/files/21626420000.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/44361511977.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/gaverareluxab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/free_certificate_of_completion.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/sigenolumo.pdf
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/agenda_2020__imprimer.pdf
    • https://cdn.shopify.com/s/files/1/0440/3088/6053/files/93232317740.pdf
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/i_smoke_two_joints.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4756/files/34265941789.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2484/files/37868211215.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/human_anthropometrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/95298465421.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_off00009083.bin
088372aa890afce729922465c719364e2e9bad0e6447fb8c324fb4b3a209ca61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9083 5064 bytes
font_01_sfnt_off0000a1b3.bin
e74dc3018b58e4475537f96f816ef220da03df588f35e832cb47d736f985198c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B3 10208 bytes

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