Malicious PDF — malware analysis report

Static analysis result for SHA-256 9597f34078c4b870…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 22:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba189bbe611edfaa224cc699bc9752b9 SHA-1: f990794dd3dd7fd710c38bc3d67060a0f2bb2991 SHA-256: 9597f34078c4b8709fd5d94c19474210a6b089b2dc8ec92d8dc07c838263134f
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.ru, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains the same URL, reinforcing the intent to redirect the user. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=home+bodyweight+workout+plan+pdf
    • http://files.anchoredsoulfit.com/uploads/1/3/1/8/131856158/wumifife.pdf
    • http://files.mindfit-performance.com/uploads/1/3/0/7/130775145/8945779018afcf.pdf
    • http://files.halldavismarketing.com/uploads/1/3/2/6/132681992/bapezolosevomezake.pdf
    • http://files.fancyfarmmanor.com/uploads/1/3/0/7/130740391/0515152f49.pdf
    • http://kawapegi.olmiks.pl/uploads/1/3/2/7/132740214/runadolawuzizolufeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1537/1932/files/27418537811.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/fakoriferujidibapuwigezo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0102/8503/files/39439173546.pdf
    • https://cdn.shopify.com/s/files/1/0428/3419/8684/files/how_to_join_a_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/mejolixexomona.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/zovobaparuxegimudem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/72460941274.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/5878159817.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/68629640824.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/english_speaking_topics_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/71834221180.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_off00006485.bin
966863d0046f492f45c0262ff421fc259e7c4fe9d66eb28c7780a8d1443f5bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6485 5636 bytes
font_01_sfnt_off00007797.bin
b3c3c59203c6a62c3e35b4ea5eabc75bcab8d1a9d4617bdc6edd992594367b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7797 9976 bytes

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