Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d8fce387bf0908…

MALICIOUS

PDF

43.5 KB Created: 2020-08-31 23:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fa12bcddebfa785bb83ef7e36b54258 SHA-1: 146dbe08f09e2a9b5a18c2b6e95c8dac1ea32a37 SHA-256: c4d8fce387bf09080ce7768de53bef9a63f297d4ce18b1ff5440d273b4a21d35
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=finding+least+common+denominator+worksheets', is designed to redirect users to malicious infrastructure. The file also exhibits characteristics of a PDF link farm, with numerous external links, suggesting an attempt to manipulate search engine results or distribute malicious content broadly. The primary attack pattern involves luring users through a deceptive link.

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.me/wix?keyword=finding+least+common+denominator+worksheets
    • https://static.usrfiles.com/ugd/8de238_722e82449cde4340aa532588eb98a4f8.pdf
    • https://static.usrfiles.com/ugd/73f3b0_e4ab25b6cb8b4831acd95efb4d330fe7.pdf
    • https://static.usrfiles.com/ugd/067ecb_ec9f4f21405a4330a19ec224854477f0.pdf
    • https://static.usrfiles.com/ugd/b910ae_f7bcb378855842029ccc0388cbf4d09b.pdf
    • https://static.usrfiles.com/ugd/f4de5e_86b3ceec758e40d8841d57aa51879136.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a498d95f1c549b0a84515fce544a631.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ba1575a95e042ae8e625d3dd533067c.pdf
    • https://static.usrfiles.com/ugd/353d00_20005f0b76e04d1e9f719069099d5d49.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/loguliwotuzibelatat.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/81454254406.pdf
    • https://cdn.shopify.com/s/files/1/0431/4854/2109/files/.pdf
    • https://cdn.shopify.com/s/files/1/0462/6179/7013/files/38628457170.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/noxogififefanutevava.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_off00006ad9.bin
7ab7c00301483d84141d08ef0d32fcd77977e0dd75d1ddea76a075166fa43950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD9 5464 bytes
font_01_sfnt_off00007d57.bin
f4aa0126b1ae5406b0f3eb5ae2d8b2471db7c5defb625c111e1ea8c35c8a73cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D57 10512 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.