Malicious PDF — malware analysis report

Static analysis result for SHA-256 f531668b59b9d6a3…

MALICIOUS

PDF

49.2 KB Created: 2020-08-23 21:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af76f947c16062e5d364e6136e1cdb7b SHA-1: a768edbc3c15c83b9f56f3de9493dd320ae4e877 SHA-256: f531668b59b9d6a3a59b4fabcf751acb2449caedfc65ad82b7fce6c428944bff
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is designed to lure users into clicking on it under the guise of a game guide. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of an SEO link farm to obscure the malicious redirector. The ML classifier strongly indicates maliciousness.

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.com/pify?keyword=bungou+stray+dogs+mayoi+inu+kaikitan+guide
    • http://namupegu.maldonarchive.com/uploads/1/3/0/7/130776167/kogiwijokojixab.pdf
    • http://bolukitu.kamenrider.ca/uploads/1/3/1/4/131437657/gedabab.pdf
    • http://files.youreassemble.com/uploads/1/3/2/3/132302888/1352935.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/69294728583.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/57873530277.pdf
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/12958759577.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/foliduges.pdf
    • https://cdn.shopify.com/s/files/1/0465/0201/9230/files/infection_prevention_and_control_nice_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/assertiveness_training_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/34758084653.pdf
    • https://cdn.shopify.com/s/files/1/0460/6820/3675/files/xolijad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0440/0683/4334/files/wulejemalev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068f6.bin
3bb57ab7d98d556ef5950b77fac83568713f4360335fa6da7b777804f9b706e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F6 5720 bytes
font_01_sfnt_off00007cf7.bin
106304bfb564c46652a922503371f8ad09e6d742cb7a6416d82d6f3302605ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF7 5328 bytes
font_02_sfnt_off00008f08.bin
94728e0ab2d4452589177d63237b42bbd23aa4ad78f9ebcdc7087656579ebf0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F08 11224 bytes

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