Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6f0314ddaeede4…

MALICIOUS

PDF

39.2 KB Created: 2020-08-12 02:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1f0de0e731344917cbc8754b86a74a9 SHA-1: d04127867812251e198ef4225a01dd562388274a SHA-256: 1b6f0314ddaeede4ee3e4a4e3ce365ad8f7048782ed71d1390f70f7723204908
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a precise secondary payload or user-facing lure beyond the link redirection.

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=peritoneal+dialisis+adalah+pdf
    • http://files.kungfuabq.com/uploads/1/3/1/3/131379590/subagezejexalog-vizin-vezuket.pdf
    • http://files.agentcprojects.com/uploads/1/3/1/8/131872015/sekujojo.pdf
    • http://files.purplepoise.com/uploads/1/3/1/3/131379037/407d9a4bf30fcc0.pdf
    • https://cdn.shopify.com/s/files/1/0431/4339/7525/files/learn_english_grammar_file.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7206/files/56867258687.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2821/files/achievement_motivation_theory.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/5937661369.pdf
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/87485926910.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/xosomo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5572/7260/files/fetovesuvobaluwatexofop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faxusumowavunisipor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/90416668273.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/87268451439.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/92440343268.pdf
    • https://cdn.shopify.com/s/files/1/0433/3335/3627/files/43477775216.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_off00005d05.bin
bb44e66846e2de42e5da01b5051dc4daf9b01c29edd202cfb1df323f0764fc1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D05 5132 bytes
font_01_sfnt_off00006e6a.bin
4b052a79c8e998b6eb81580c841cb4476e399161953d3b8ecfe11287929cd0fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6A 9816 bytes

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