Malicious PDF — malware analysis report

Static analysis result for SHA-256 8033ac1e828ff22e…

MALICIOUS

PDF

41.8 KB Created: 2020-08-08 20:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2dc1e9bb11bb3dd834550a9f6f58045 SHA-1: 4d51da8fb41fb4b4b82024f23797529ee41135f6 SHA-256: 8033ac1e828ff22e50fc62e0ea1857c5b3606f68dabbe4c3e0ea4f2a9d46e7f5
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=beatles+guitar+sheet+music+free+pdf', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious 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.cc/pify?keyword=beatles+guitar+sheet+music+free+pdf
    • http://files.nodaysoffalthletics.com/uploads/1/3/1/1/131164122/3225b1fc94.pdf
    • http://files.lairdnorton.org/uploads/1/3/0/9/130969598/02ead7e.pdf
    • http://files.patrickinpanama.co.uk/uploads/1/3/2/6/132696274/jijanowavuxo.pdf
    • http://files.recreationlifestylehealth.com/uploads/1/3/0/7/130776241/mebeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/anormalidades_del_cordon_umbilical.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/70850456188.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/85500341758.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/66769845736.pdf
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/jexepeja.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/dasiwemuzunabavivibinaju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/what_is_the_storage_form_of_glucose.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/sudujabebavududi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/sawakipelapejowelug.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/navigator_dagger_ffxiv_arr.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_off0000641c.bin
559b7aebc2e9a8af1c6de620137fbb61570a2385e6889ec4d72279444ac90297		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 5616 bytes
font_01_sfnt_off0000770a.bin
1827b0bd5a438fc690561cdbcbde18cce5f6a5bb8fb67495bb18a3b4cf482dab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770A 10412 bytes

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