Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1c82b1e0f8451c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-19 05:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ef39f7a23d03b276bb82c952006bdc9 SHA-1: 72f918a1e2dc5f6efb24ed8e28bd005fe8cf82cc SHA-256: 4d1c82b1e0f8451c4ea3fd3198e9e3b4e6bfc7c34b6c06e6d0e08cabdca4dda8
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a lure to click on a 'marketing and advertising company profile pdf'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm intended to obscure the malicious redirector.

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=marketing+and+advertising+company+profile+pdf
    • http://files.mindscapegallerystl.com/uploads/1/3/1/4/131407855/kunojikon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/sidurilobekesijipegax.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/79790018618.pdf
    • https://cdn.shopify.com/s/files/1/0450/9679/6313/files/21769985167.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/arthritis_research_back_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0448/0693/0583/files/lizijebabesujore.pdf
    • https://cdn.shopify.com/s/files/1/0437/9449/7698/files/the_scarlet_letter_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0133/files/rafunelitapi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/avid_virtual_instruments.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_off00005b58.bin
1dd60df122de638bc5d590ca7b8b57eac86f5bb74e451a172b4296d9dd082b4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B58 5492 bytes
font_01_sfnt_off00006e0b.bin
642ea86ac6b28f67db4e04ad2c8c0fe4c63f13ccd10917bae8c983a6d27dfd16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0B 10120 bytes
font_02_sfnt_off0000907a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907A 4324 bytes

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