Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7e074fa5248ab0…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 11:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac70f5a590279ccde8460d6445d2fb0e SHA-1: 3bfa110efefbeacfc18f60eb585a7a33c906d6ec SHA-256: 4f7e074fa5248ab0540e3b89c21b40fc37263672f033d971ff3ffc7ec05c5526
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=degradacion+de+los+suelos+en+cuba+pdf, which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious content through a link farm strategy.

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.cc/pify?keyword=degradacion+de+los+suelos+en+cuba+pdf
    • http://zoxoxolax.kerkart.com/uploads/1/3/1/0/131071157/177245.pdf
    • http://wesumike.merrifieldseminar.com/uploads/1/3/0/8/130813988/busekep-mufazuso.pdf
    • http://xudegaj.pumpernickelpictures.com/uploads/1/3/1/4/131453177/5632210.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/employee_mileage_reimbursement_policy_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/6903/6958/files/usb_mod_menu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/mixejawigenuxiviwoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/20709144391.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8062/files/lezek.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7404/files/49392604648.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/blank_treble_clef_staff_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/78880147349.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/fofegexadamubap.pdf
    • https://cdn.shopify.com/s/files/1/0452/6276/6242/files/70851527876.pdf
    • https://cdn.shopify.com/s/files/1/0451/8245/1861/files/78175438090.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_off00005bcd.bin
68d2bf7a275e5a54f90cff03f4cea89a9194e1fcb935bfc3c43999365b11653b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCD 5464 bytes
font_01_sfnt_off00006e68.bin
b559511b1d71633cd3c892042833f72fa095003a3cc4657855b2ea7a14c213e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E68 10656 bytes

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