Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c17fe63fbd845d…

MALICIOUS

PDF

46.5 KB Created: 2020-09-06 17:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b664920e9787c34a9c5fd84345fa3c8b SHA-1: f286edc405803e47e8baf4fe1cb1bec7981d9215 SHA-256: 38c17fe63fbd845d9ed373daba04830b2961e509e3ce49d612245fc53c9af9e1
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a technical document. The embedded URL https://ttraff.club/wix?keyword=cifs-+utils+rhel+7 is flagged as malicious. The document also contains a large number of links to external PDFs, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, but the PDF structure and malicious URL indicate a phishing or redirection attempt.

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.club/wix?keyword=cifs-+utils+rhel+7
    • https://static.usrfiles.com/ugd/529ba0_e93b4ff3d7734836967ee8e1dca1d863.pdf
    • https://static.usrfiles.com/ugd/909b15_23a8a14334804e1c98a38458a2b53c58.pdf
    • https://static.usrfiles.com/ugd/b8c837_9083d8142d3d4032a29129d32455429d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1036b049c496476fa302a3d9a69dcf2a.pdf
    • https://static.usrfiles.com/ugd/a4d998_e4972e96216c49c7b50922421f69d27e.pdf
    • https://static.usrfiles.com/ugd/8e1900_2428bc4f9c5a4020be227a31b9b3abb1.pdf
    • https://static.usrfiles.com/ugd/ca32a8_b21a0f8065bd48eeb9db40aa0c650b8b.pdf
    • https://static.usrfiles.com/ugd/b0cb2d_d9275449da54470d86896fe774c6a7f4.pdf
    • https://static.usrfiles.com/ugd/54fa57_e503b0b7a1824679b69d5937d8fa54a6.pdf
    • https://static.usrfiles.com/ugd/5a1791_bb76149b7ec342428dd9131a514b96c4.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3902/files/85953408797.pdf
    • https://cdn.shopify.com/s/files/1/0446/2444/5603/files/hallelujah_lyrics_and_chords.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_off00005fe9.bin
d08b2ee83f4d6e39fc56328577dfa0107c259fba925f819f33da8df429795b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE9 3588 bytes
font_01_sfnt_off00006ca9.bin
9d6dfb7b53da0a4bafa95497e0df50f0a9e6a1456c18e407d2a359254e5b44aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA9 4664 bytes
font_02_sfnt_off00007c89.bin
9e8a8423c3c129b691369d6e560425f07d42e5bbcf74abb413da34ae0359e0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C89 15192 bytes

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