Malicious PDF — malware analysis report

Static analysis result for SHA-256 be25ad05e9754931…

MALICIOUS

PDF

50.7 KB Created: 2020-08-29 09:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9cf78e16a49633150e1b0ec3d810c5d SHA-1: f617bafa274b74ec069b68bd57f63a08cc26e2d7 SHA-256: be25ad05e9754931ac7e919e7fed114a667168d3a616615fae4485617ca41ca7
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Game of Thrones' and includes the malicious URL. The PDF also contains a large number of external links, as noted by PDF_SEO_LINK_FARM, suggesting a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=game+of+thrones+sezon+1+b%25C3%25B6l%25C3%25BCm+7+altyaz%25C4%25B1
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/acr_contrast_manual_metformin.pdf
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/maxon_cinema_4d_r20.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/john_deere_314.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f1b9f5a88e84d1e847c33a712fe93b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_4badd7a6e6914a7394714745dbf4893f.pdf
    • https://static.usrfiles.com/ugd/b8c837_548c94c05dee4178b9bbfeab9398e19c.pdf
    • https://static.usrfiles.com/ugd/b8c837_87138a1d72a24928a626ab6d5ac58bec.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/demori.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4899/files/bihar_stet_previous_question_paper.pdf
    • https://static.usrfiles.com/ugd/b8c837_23583bb9a31d42559ac8d61122f7ed46.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fc9513cd8a3429c960734aaf5d32b0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7eaab494c2c649598140e8a8cbc426e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b832b9a38e744de4ad2ae6d6bb618ed0.pdf
    • https://static.usrfiles.com/ugd/b8c837_8229140aaf0b41858f7c244115af44ea.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_off00008264.bin
ffd3a208ec1c85a1c73738246657b81bd0c75216841fb945d89ff6f1f780446f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8264 5752 bytes
font_01_sfnt_off00009576.bin
2503cf9283921c3f0dd12a1ee5a416329b85172f5bc6fb711e0c281d0e25dff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9576 12288 bytes

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