Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f55df918376fc7a…

MALICIOUS

PDF

47.5 KB Created: 2020-08-02 13:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0317546ba5527a0f0bb18f90d4052158 SHA-1: fa228caae650adc27bb7ff048a38076dc41e1b8b SHA-256: 8f55df918376fc7a24e0c9c4895faf49e2bd1fe215af5548c7b7ab33c25fd17f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text related to 'Maxtor one touch', suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve search engine ranking and distribute 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=maxtor+one+touch
    • http://files.wrprc.org/uploads/1/3/2/6/132695467/xovazepetoku.pdf
    • http://files.completedentistrystudio.com/uploads/1/3/1/8/131871740/3c4a4e8cc7.pdf
    • http://files.amorehairdesign.com/uploads/1/3/1/0/131069870/6066387.pdf
    • http://files.solkitchenfoods.com/uploads/1/3/1/3/131398424/8404259.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/56278184342.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/24068177179.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vunususojorimit.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/pigaweloxirobavuvonisonob.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0326/files/gajovalibowirob.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/pezamapinosufot.pdf
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/setesixa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/pesolowod.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8764/files/83489575524.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/15922589584.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/6326728334.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/daxirawozobagovogukefexa.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_off00005fb6.bin
e3c1e39cf24879817867c42a3d3c5b549cb5118ed71ad20ba4fd21eaf340d5fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB6 4748 bytes
font_01_sfnt_off00006fda.bin
2caeb454a93b18584067451a2b12acb77e4a50455da74f41c574601843ce0219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDA 1648 bytes
font_02_sfnt_off0000781e.bin
fb6f79215e05f3d2469c9be35c51e94d68deed97749da54ff2aa9a20c7ac1575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781E 10316 bytes
font_03_sfnt_off00009b70.bin
73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B70 16204 bytes

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