Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd84e38a5c2a1a21…

MALICIOUS

PDF

48.5 KB Created: 2020-08-31 21:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04bfb82f76ffa57bba1d39e8ce0af0be SHA-1: 63d12f27fa2ba98ce5ae850cdf61c317add2b469 SHA-256: dd84e38a5c2a1a21275421a88adcc1344920d5dcb2455bceb6450669bd118adc
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirector link to 'https://ttraff.link/wix?keyword=fgd4536+pdf+datasheet'. Another heuristic identified a PDF link farm, suggesting a broader SEO-based distribution tactic. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the suspicious URL and references to a PDF datasheet, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=fgd4536+pdf+datasheet
    • https://cdn.shopify.com/s/files/1/0436/4396/1504/files/topographic_anatomy_of_upper_limb.pdf
    • https://cdn.shopify.com/s/files/1/0437/9911/7986/files/30879241281.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/gafopu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/active_and_passive_voice_quiz_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/71789321250.pdf
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/gajemurowaparifuxekej.pdf
    • https://static.usrfiles.com/ugd/23e9be_a2186e1e30fa4091a4a8f3e7361e937c.pdf
    • https://static.usrfiles.com/ugd/eaf48f_5d0acf37087248a595248a3e7aa0d348.pdf
    • https://static.usrfiles.com/ugd/850f07_2589fbebd7bf4810b56dc2cb3a63d854.pdf
    • https://static.usrfiles.com/ugd/b8c837_81b87fe516dd48da9ca8c03f5954dd05.pdf
    • https://static.usrfiles.com/ugd/2ca09c_5f33e1aedfd94cc2a52b4e24c92fe791.pdf
    • https://static.usrfiles.com/ugd/e3834b_7bfa8a91e56a46f18454d9bfa3847a4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_928d4ae96bb3437abc9af4af673dde39.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052b2.bin
fb8efc21509387da72aee1183c6c552682b6c47c129daa1bb46998a8edbf1702
pdf-font-stream PDF embedded font (sfnt) at offset 0x52B2 2020 bytes
font_01_sfnt_off00005c2a.bin
f1271bda17e80a3bceefdfd3edc7d0f7bf828a8b1a1e2894fde4420e79e39959
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2A 5660 bytes
font_02_sfnt_off00006f75.bin
03f79918bfd571b7f7f3da04d550f347e7e8d488d248ffafd482d8f44497c754
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F75 8268 bytes
font_03_sfnt_off0000867a.bin
8347504e7e329531f26f1d47ca3dc3f65f3fc96553ff8effaf4d0dbc51b1b587
pdf-font-stream PDF embedded font (sfnt) at offset 0x867A 15044 bytes