Malicious PDF — malware analysis report

Static analysis result for SHA-256 461187a716f28cbb…

MALICIOUS

PDF

35.1 KB Created: 2020-08-05 17:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ac3c2b9320a1a32062f7cfc9abb59ce SHA-1: ec7a0ff2cbbd16f36427abfae47a4aaff501f4b5 SHA-256: 461187a716f28cbb2dcea207ea3070aad02e8ceb06be5328f88f8d9d22077aa8
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, disguised with a keyword related to educational content. This suggests a phishing or scam attempt. The PDF also contains a large number of external links, many hosted on Shopify, which is characteristic of SEO link farm abuse to obscure the malicious redirector. No scripts were extracted, but the primary malicious activity is the redirection to the ttraff.com URL.

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.com/wb?keyword=sentence%20structure%20worksheet%201st%20grade
    • http://files.wacoceg.org/uploads/1/3/0/7/130738620/bosula.pdf
    • http://files.evelynjuliabodywork.com/uploads/1/3/0/7/130775084/xatolorimolivu.pdf
    • http://files.kellcobakery.com/uploads/1/3/1/8/131871633/6384447.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/80394411101.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/metabolism_reset_diet_alan_christianson.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/57680363964.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/47873445663.pdf
    • https://cdn.shopify.com/s/files/1/0433/7231/4778/files/fetomexatotitajumoverir.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/29161739558.pdf
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/nimuril.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/bijevexe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/xaluxarusukigibegojow.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7599/files/82635832890.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_off00004ad2.bin
e01a560ac61f0480abdd80ca0d87ed820d2f33f31fc2e2216fce13484d984b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD2 5480 bytes
font_01_sfnt_off00005d89.bin
c3da9ae101f9d8b78088ba9e489cdca379a32d9627645dac19d8a3d0719574da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 9916 bytes

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