Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c2bf47e26cfcb7…

MALICIOUS

PDF

53.8 KB Created: 2020-08-09 23:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5771267b2cfdc7a19e557c2063ded9b SHA-1: 6a5f98a4c4a439823e9be1b77bad57b57b99a196 SHA-256: 93c2bf47e26cfcb79f11665192fb48c607d1d159bb0ad41f22b6ba22bc0bcc99
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in a lure for a 'ratio analysis project report free download'. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which is likely used to host or chain to further malicious content.

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=ratio+analysis+project+report+free+download+pdf
    • http://files.happyfulfilledlife.com/uploads/1/3/1/3/131382243/b85f9ee5b0d52.pdf
    • http://files.openmul.org/uploads/1/3/2/6/132682607/nirupepotoveges.pdf
    • http://files.mobilebirdgrooming.net/uploads/1/3/0/7/130776351/371a096d.pdf
    • https://cdn.shopify.com/s/files/1/0436/7882/6661/files/bitrix24_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/nefomekexikorowurepep.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/97151812767.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/94378534874.pdf
    • https://cdn.shopify.com/s/files/1/0434/3401/6924/files/43522508449.pdf
    • https://cdn.shopify.com/s/files/1/0432/6391/8246/files/leginoligetoxade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0428/4379/9719/files/5728759650.pdf
    • https://cdn.shopify.com/s/files/1/0434/2933/1100/files/tonezalagoxefo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/58646718807.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/51792712830.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/31018514233.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_off000092f5.bin
b052c6e9fa6fd6fec5cfdbabc7c78e6545407bba3aa278c0e41ecca819dc883e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F5 5424 bytes
font_01_sfnt_off0000a59d.bin
4b0943186511511e0ac2cce371c706c38e267794a606b50b74de269678b9fd25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA59D 10568 bytes

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