Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1504eb54eff6b1…

MALICIOUS

PDF

50.4 KB Created: 2020-08-03 18:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 075832252f22504bea7b5dd349b36396 SHA-1: 60d5eb19b2458f0dc009141d23c0e0c0802f01d5 SHA-256: 9c1504eb54eff6b1193fd40ddf17bcafa14abe475385db1e54f40d32150d6f64
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=carp+fishing+rigs+pdf', suggesting the primary intent is to redirect users to potentially harmful content. No scripts were extracted from this sample.

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=carp+fishing+rigs+pdf
    • http://files.raemiz.com/uploads/1/3/0/8/130874526/2739092.pdf
    • http://files.thecatholiccandlecompany.com/uploads/1/3/1/3/131398530/674569.pdf
    • http://files.alabamagirlsstate.org/uploads/1/3/0/7/130775916/xegosof-sixutawoxekad-revomamiwi.pdf
    • http://files.thaitogether.org/uploads/1/3/0/8/130874593/8392690.pdf
    • https://cdn.shopify.com/s/files/1/0438/4794/2304/files/free_online_poker_games_with_fake_money.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/adobe_pdf_converter_software.pdf
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/dovogovage.pdf
    • https://cdn.shopify.com/s/files/1/0431/1656/0550/files/fijunebadize.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/sumevetubijutalezulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/83658649536.pdf
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/54743136169.pdf
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/30315111798.pdf
    • https://cdn.shopify.com/s/files/1/0429/8876/5337/files/ectomorph_workout_program.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/anime_girl_death.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/49339756867.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_off00008909.bin
81475a04f9695196e157c0a77e975779398691846caa2c6a68d3cc1fe880a20a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8909 5176 bytes
font_01_sfnt_off00009a9c.bin
2a93f2683583c9b9e71e36b2065cc0b25e2074913c8c3ba9a72967b617f33452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9C 9992 bytes

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