Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0215b285f0b6dca…

MALICIOUS

PDF

52.8 KB Created: 2020-07-31 05:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1660053eb4b62e12c001ed387c042cf SHA-1: 8fc7b4d8366de7ae1c604824bba49260762b246e SHA-256: d0215b285f0b6dcaead9d621ce58b5eea22828e999014fdb006cc16705a355f8
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure for search engine optimization, aiming to trick users into clicking malicious links under the guise of providing a manual. The ML classifier also strongly indicated 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.cc/pify?keyword=autodesk+eagle+9+manual+pdf
    • http://files.naturalmedicineinc.net/uploads/1/3/2/6/132682701/memapuzitope.pdf
    • http://files.chinookaircraftsales.com/uploads/1/3/0/7/130738720/nefugi-donixekekakuj-gevipamemop.pdf
    • http://files.jacksonvilleriverrally.org/uploads/1/3/1/0/131071191/benazobamepider.pdf
    • http://files.chinookaircraftsales.com/uploads/1/3/0/7/13073872
    • https://cdn.shopify.com/s/files/1/0430/4335/6821/files/luxavapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/lavovesoto.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9066/files/vedabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/47477645343.pdf
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/fekuwab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64255738852.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30347825404.pdf
    • https://cdn.shopify.com/s/files/1/0432/0054/4931/files/46907864418.pdf
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/40110499373.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_off000087c9.bin
e40980ce2db4ebe40751dbe4c83ea297856f7f307ca6b6d8fc3421134f636591		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C9 5308 bytes
font_01_sfnt_off000099cb.bin
8a3d814b8fad95cdc767653ca5e5d616fd8f37e028816ca59cbb1694d49bf607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99CB 14080 bytes

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