Malicious PDF — malware analysis report

Static analysis result for SHA-256 254a43e10e489f4f…

MALICIOUS

PDF

43.4 KB Created: 2020-08-14 20:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b57dad72b1312c8a3f1253d3d7f5da27 SHA-1: fd8a5d31b81a7051a8ed29b894ad3d7ef19e96db SHA-256: 254a43e10e489f4f3f2a15605e2cf4c3b1fd5cbe8a63275320b511f73ded75eb
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Another critical heuristic indicates a PDF link farm, with 'cdn.shopify.com/s/files/1/0432/7853/2758/files/rigike.pdf' being the first listed. The document body, though partially corrupted, contains text that appears to be a lure for a movie title, reinforcing the malicious redirector's purpose. The ML classifier also strongly flagged this PDF as malicious.

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=patal+bhairavi+full+movie
    • http://files.empoweredbyloveministries.ca/uploads/1/3/0/7/130739376/793c4404dc.pdf
    • http://files.blwcenter.org/uploads/1/3/0/7/130740323/8794972.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/rigike.pdf
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/49236189233.pdf
    • https://cdn.shopify.com/s/files/1/0439/2920/6952/files/lutheran_study_bible_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/domudarufojuzajifumeve.pdf
    • https://cdn.shopify.com/s/files/1/0438/0835/8561/files/pokemon_fire_red_omega_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/legujif.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/nevemej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/91905368932.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/18685867014.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_off00005e51.bin
7ee4d262058e737a26a33adffb9bca946b22bef06d0e699dbed3eeb803f23d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E51 5032 bytes
font_01_sfnt_off00006f54.bin
e6573514fe8fff7b271aa05e8291bc43a84eacea995d22900a9e66ed35a69175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F54 10740 bytes
font_02_sfnt_off0000944e.bin
ffa31fb4652a9bd69b3482ba5b8370e1bfe68e1bf39be18e532fc4fb791e40f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x944E 3164 bytes

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