Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f77152929bd705…

MALICIOUS

PDF

43.7 KB Created: 2020-09-02 04:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b6cdbb448632925f725deaa6a35a27f SHA-1: aab10f25af3529d747548aa3ec46bbde331a4ac4 SHA-256: d4f77152929bd7054c812297280752a5ddb80c625bf3b61c979b7d04eed5e29a
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to a URL that promises 'utorrent pro crack for windows'. This is further supported by a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK. The document also contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which likely serve to distribute the malicious content. A low-signal heuristic for SE_DOWNLOAD_BUTTON indicates the presence of a call-to-action, reinforcing the lure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=utorrent+pro+crack++for+windows
    • https://static.usrfiles.com/ugd/79e0dc_dc3df765552b49d29c966ab04384c46e.pdf
    • https://static.usrfiles.com/ugd/b50c55_b3ff7ae219a7488ab63594ddce8bb568.pdf
    • https://static.usrfiles.com/ugd/99a8f2_0ec85a7faa4541d1bf2e6867fcb76449.pdf
    • https://static.usrfiles.com/ugd/fb5067_4dc5600025f1491e973a4771b051d6f3.pdf
    • https://static.usrfiles.com/ugd/a86d68_9e3dee9a78794832925c298835d35a9b.pdf
    • https://static.usrfiles.com/ugd/0c4177_2a080fb775b7495e9dee4b65e1801d10.pdf
    • https://static.usrfiles.com/ugd/d5415a_daae18fcc6914a30be950c7d01b50aae.pdf
    • https://static.usrfiles.com/ugd/d5415a_08264250ba1742668623e98e0a1c3426.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_1b995639f49f4660b4e32650b9141877.pdf
    • https://static.usrfiles.com/ugd/162fe6_faba378c18e54606889f28349e63fe48.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1549/files/bushcraft_mors_kochanski.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/fabinejesibalewuforuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0650/files/dolores_o_riordan_net_worth.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/
    • https://static.usrfiles.com/ugd/fb

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d1d.bin
cb0ffddfdb9a0d6881b4327092b71145abe0f0906e860f18c60aa8f5c8950ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1D 5264 bytes
font_01_sfnt_off00007f33.bin
d83bc74bc4d8491ceb0f91f6540f065248e4dc05b64f4d2e2f4c21839a5efddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F33 10112 bytes

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