Malicious PDF — malware analysis report

Static analysis result for SHA-256 280e172aebe3edd2…

MALICIOUS

PDF

43.6 KB Created: 2020-08-19 11:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7c47a2e4fe4c63cb5c837013ebf1286 SHA-1: 7612cc1dbc80804f9d0ec13cef1a899a7a35b596 SHA-256: 280e172aebe3edd2e558446a1418553e3ba79b5bdb155e24d6ee78a69b00cc13
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at https://ttraff.com/pify. The document body, though heavily obfuscated, contains the same malicious URL and a seemingly benign URL, suggesting a lure to a malicious site. The presence of a link farm heuristic further indicates an attempt to distribute malicious content.

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=ac%252F+dc+back+in+black+album+320kbps
    • http://files.petcardia.com/uploads/1/3/0/9/130969656/toxira.pdf
    • http://files.shaunaleighwrites.com/uploads/1/3/1/4/131437977/menunudexaju_majajixuxet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/baofeng_bf-_888s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4555/9189/files/18652440977.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/baricco_libros.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/pofiboxaje.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8663/files/academy_stars_4_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/deductive_reasoning_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/7994/8695/files/mathematics_for_economists_simon_blume_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/tda2020_bridge_amplifier_circuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/7224/2342/files/skoda_karoq_amundsen_bedienungsanleitung.pdf
    • https://cdn.shopify.com/s/files/1/0430/1720/7971/files/48064520710.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/lightning_protection_of_buildings_regulations.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_off000060a1.bin
791f98a610905874c369c50b04f3abfe4a9569f729df4c87d3e423f3d76f7cca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A1 5788 bytes
font_01_sfnt_off0000743f.bin
56a6f4de281d08be3ef7bd1917bfba2ad28839c3ee32a9d6fab3e959ef41bb05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743F 14840 bytes

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