Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b348c714fa3503…

MALICIOUS

PDF

54.0 KB Created: 2020-08-22 09:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b483427d730fb145807e0afa9a6a0ca2 SHA-1: de053e869af61ab403fd5d9698671c3a4692ce66 SHA-256: 82b348c714fa3503d9db4256a3d515b3ac97685e577ec71795855d2b41ce4550
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=candidate+statement+of+results+template'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a link farm or redirection tactic. The primary intent appears to be luring the user to the malicious ttraff.ru domain.

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=candidate+statement+of+results+template
    • http://files.learningthefinnishway.com/uploads/1/3/0/7/130740391/5292455.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/97035162984.pdf
    • https://cdn.shopify.com/s/files/1/0431/9543/3117/files/71374555040.pdf
    • https://cdn.shopify.com/s/files/1/0434/5289/1298/files/24056638311.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/51140348054.pdf
    • https://cdn.shopify.com/s/files/1/0450/3538/9086/files/zezugezunaduxub.pdf
    • https://cdn.shopify.com/s/files/1/0448/0991/2477/files/libros_de_administracion_publica_municipal.pdf
    • https://cdn.shopify.com/s/files/1/0437/0314/0506/files/dujakoguzakozivimarebif.pdf
    • https://cdn.shopify.com/s/files/1/0431/8373/4943/files/business_process_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/28727300108.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d72.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D72 2828 bytes
font_01_sfnt_off0000976c.bin
7e6a82c830cffef82d7765e60c0c56cc9a11114eda59c1596e2b07e4707ac5a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x976C 5092 bytes
font_02_sfnt_off0000a89e.bin
9d34c819680ecadba00b0e8b7bba92e7ad1eb51c98122ee33fdd28e9f75dedc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA89E 10156 bytes

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