Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d96cb450ef7b957…

MALICIOUS

PDF

44.5 KB Created: 2020-09-17 08:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a90f52730fe5b05a060a7a3fdfd835cc SHA-1: b3dd5afa64ce4b6a6e2caac6bc6c6c6113e8a920 SHA-256: 2d96cb450ef7b95732240a3e4671bdddc97632d939502b34d812a1d19bb7599a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to mimic search results, directing users to a malicious redirector at 'https://ttraff.club/wix?keyword=honda+outboard+repair+manual+pdf'. The document body, though heavily corrupted, contains fragments of the lure text and the malicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, many pointing to Shopify domains, further supports a link-farming and potential phishing or malware distribution scheme.

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.club/wix?keyword=honda+outboard+repair+manual+pdf
    • http://files.mesamindfulness.com/uploads/1/3/1/3/131384335/c54a97c33ffd1.pdf
    • http://files.ctffaalumni.com/uploads/1/3/1/3/131379085/bexoxef_pujukil.pdf
    • http://vizuwa.pauljbennettauthor.com/uploads/1/3/0/8/130874134/mezolapifavokarud.pdf
    • https://cdn.shopify.com/s/files/1/0439/3769/3851/files/epa_609_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/puvixotexa.pdf
    • https://cdn.shopify.com/s/files/1/0464/6518/7992/files/measurements_and_calculations_in_chemistry_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/17785688902.pdf
    • https://cdn.shopify.com/s/files/1/0437/7251/0362/files/78198512746.pdf
    • https://8373f743-767a-48a4-bb4f-4031e8e7dec0.filesusr.com/ugd/e6092c_bff3d8b4cf4547f6b0c203273b35f8b9.pdf?index=true
    • https://5f23112a-08e2-41ff-b5c5-c56569be2b49.filesusr.com/ugd/314c35_e76d8f212b6c4a979799307634e66cbb.pdf?index=true
    • https://2aa27abd-37cb-4a0a-b811-be903139d3fd.filesusr.com/ugd/90d19e_bdbd68e9fba148c7b727a6b6874f84b7.pdf?index=true
    • https://c543b01d-e8dc-4efb-abee-0062b27e4426.filesusr.com/ugd/bca722_c3472eb81dee44058064417b739aa08d.pdf?index=true
    • 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_off00007050.bin
508ae1454e6f49890ade2aefcec5b3659d60ea99d3718b216beb61296dc2c878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7050 5112 bytes
font_01_sfnt_off00008194.bin
f185d3bd1cff39f7fa714776e4599b2dd5cfe2d079b8d17818d9bc77779e8927		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8194 10468 bytes

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