Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4741f059a631561…

MALICIOUS

PDF

50.5 KB Created: 2020-08-15 00:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dc444ccf5b73a33c69bd85f8789f085 SHA-1: d9956cf82a62b72a0294cff0ee7ba357c1da89d6 SHA-256: a4741f059a631561888ae329fddb7025a96c4184fad04944e7bbfcfc5dce0462
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=jay+z+american+gangster', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of a link farm and a malicious redirector suggests this PDF is designed to lure users to harmful content.

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=jay+z+american+gangster
    • http://fiwog.f4f-uncdf.org/uploads/1/3/1/4/131437393/vetusadajizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2873/files/html_to_java_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/wigega.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/wojireruxasibovetide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/cancer_de_colon_epidemiologia_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0428/5241/7692/files/23328510629.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/foxemowoxovojuledinexata.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijob.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6160/files/tobowuvejugisujunowuguwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/safozikuxunirivorubop.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/darurekuxadapazovikenefo.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_off00008843.bin
295881157cf35fcb51a9a9413f41c2e935aa822915c61be70cc82ecb266d81af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8843 5228 bytes
font_01_sfnt_off00009a00.bin
6b54c646689c862c508ca2da128c88c63400814b18ef73dbf670f6f77d6569a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A00 10444 bytes

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