Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5af8100e427662…

MALICIOUS

PDF

42.9 KB Created: 2020-08-09 07:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6facbe9f7c9cb7b2dd108bd62f9cee5 SHA-1: 29eef18dd3e3245983fe594ee6f21e39c30707ce SHA-256: de5af8100e427662a7d408f9648b378efd9f9aec63266c129ec952889a765dd0
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link farm and another pointing to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.ru/pify?keyword=cabinet+battle+1+lyrics+pdf, which is likely used to distribute further malicious content. The document body itself is heavily obfuscated and contains embedded URLs, reinforcing the malicious intent.

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=cabinet+battle+1+lyrics+pdf
    • http://files.nataliejanebass.com/uploads/1/3/0/7/130775229/3fa570c37844.pdf
    • http://files.ummahproject.org/uploads/1/3/1/4/131452997/fojuj.pdf
    • http://files.earomi.com/uploads/1/3/2/6/132681488/4a39453.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/74508852419.pdf
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/36612081055.pdf
    • https://cdn.shopify.com/s/files/1/0432/3151/0690/files/fibaligajowopokajebiwulag.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/31952229198.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/69040903320.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0590/files/valulapumeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7374/files/vuripewupapubinezamoba.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/lutug.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/90181202030.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/mike_krzyzewski_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38692385895.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_off000068a7.bin
c4547bb7c6079ee12c4ee0a5e6383d24423baa10692e7b2314a44575d36d422b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A7 5348 bytes
font_01_sfnt_off00007ae9.bin
0c1f2f0894af5fb560a217021bf1a6cff044bc40f7e768609b860e95e07de700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE9 10572 bytes

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