Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32774e4cc6d19b2…

MALICIOUS

PDF

34.8 KB Created: 2020-09-01 07:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42b36f84fab8ebd6085ab1226e2b7cfb SHA-1: c14992f0800cb2709d1af29ecbbff2c2e21b84eb SHA-256: c32774e4cc6d19b206eeb9dd6bd4827d2bbde1eed82f98e05df540844877f731
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link 'https://ttraff.ru/pify?keyword=formal+vote+of+approval+crossword+clue' leads to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is part of a link farm, likely designed to distribute malicious content or engage in SEO manipulation. No scripts were extracted from this sample.

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.ru/pify?keyword=formal+vote+of+approval+crossword+clue
    • https://static.usrfiles.com/ugd/19ce5d_136ec9232f5f4ad5b3e5a4a025f1a3ab.pdf
    • https://static.usrfiles.com/ugd/82e28d_94a99a11791443c1a15d87ff6df3d664.pdf
    • https://static.usrfiles.com/ugd/8cbfce_139e33df894f4cb6b32af181de057357.pdf
    • https://static.usrfiles.com/ugd/ce14f3_8941e882a2d84390994174ccb7b4d631.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_fc30b8a0437947d882606c48273eede7.pdf
    • https://static.usrfiles.com/ugd/b8c837_de06e31410784dde8635aea42a71b47c.pdf
    • https://static.usrfiles.com/ugd/ab059d_b1ae940f6c7b457e829de3e256c9e7be.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad94dfab67574461b402a75a6ea78ec5.pdf
    • https://static.usrfiles.com/ugd/b88e3d_11b22d4a88fe47e1b429b68b02444400.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed5e262a66c34816884a5691be4fe99d.pdf
    • https://static.usrfiles.com/ugd/e8506d_5a8e48ed1f2940b08494b8c3483887f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f940be56f27b41668b7cf9a291be08d0.pdf
    • https://static.usrfiles.com/ugd/74a852_7bd78d7831c447dd847e15702869af83.pdf
    • https://static.usrfiles.com/ugd/b8c837_3242fbb5d0d34c3583bbbcd71ecc4925.pdf
    • https://static.usrfiles.com/ugd/b8c837_80aecbb1ed024a25a680bbeac7b79734.pdf
    • https://static.usrfiles.com/ugd/19103d_962359909ed84391883d92899ddc1718.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_off000049fd.bin
74eb8ffc4f6297ae10923befffce7ccc2e1e7ec6787658a3d3324b0e73f23c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49FD 5408 bytes
font_01_sfnt_off00005c60.bin
08ecc70010b416a754e0f1a5bb9647ac60d4c4b5e148fe1f0b3344263f494a6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C60 9932 bytes

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