Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b93ace03a2c785f…

MALICIOUS

PDF

39.1 KB Created: 2020-09-02 13:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a9070f0d19d32af09ba3107aa01a8e8 SHA-1: b1f5e371bb3c9647a8b688de55fd883ce6a0960a SHA-256: 8b93ace03a2c785f034eb3c7f9eff61d96d4b44363c1074c0d9297d6398a577b
130 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous external links. The document body, though partially corrupted, contains a URL that aligns with the malicious redirector finding. The presence of a visual download button lure further supports the malicious intent.

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.me/wix?keyword=jio+call+recording+free
    • https://static.usrfiles.com/ugd/5a4aad_18d1798391dc4fe58f23ae287db78b7d.pdf
    • https://static.usrfiles.com/ugd/0f5b72_ee2fd53b886348178161afb1e5a06da3.pdf
    • https://static.usrfiles.com/ugd/76dd3d_198f24ce1fde4075b0cb7466657c5062.pdf
    • https://static.usrfiles.com/ugd/115d6e_c2a4709bded94885b34ae9e8b6774588.pdf
    • https://static.usrfiles.com/ugd/5438e3_8804dda6536e43948ffd1d2c9ed146c0.pdf
    • https://cdn.shopify.com/s/files/1/0437/1401/9496/files/motikixulanakozumet.pdf
    • https://cdn.shopify.com/s/files/1/0440/1925/3413/files/inequality_review_worksheet_algebra_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/53608748060.pdf
    • https://static.usrfiles.com/ugd/286fb8_1572a2e2b9fd4027b59a6234eb1cd035.pdf
    • https://static.usrfiles.com/ugd/ab63e3_75561f43aa774ad6aa556af3b0e96b77.pdf
    • https://static.usrfiles.com/ugd/32777b_613a2ff1d68344c6bbf0e14836d73c21.pdf
    • https://static.usrfiles.com/ugd/ae15ca_0b7e66a3224f4a62b9f26d0adaba5954.pdf
    • https://static.usrfiles.com/ugd/9904c2_b13f8590f19e490f844252f188ff057b.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_off00005b9a.bin
9a3b845085ade15d7f718aa32940c01a90ecccee60027974857691f65da32e77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9A 5000 bytes
font_01_sfnt_off00006ca9.bin
899b667f7025f07b1a4a4f79b56f5c271e1bab9d82da74e9d78189dd5cada062		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA9 10448 bytes

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