Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5540c1251f60316…

MALICIOUS

PDF

32.7 KB Created: 2020-08-04 21:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff4037f6f4d6833d15310cb62e9b0aa9 SHA-1: 3fde257c332816fab44b3d80f0866c534ef7e2fb SHA-256: f5540c1251f60316ec1e257f4943692ffeee799618d0a1119c1e556aa87a1723
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to this redirector. The primary purpose appears to be directing users to malicious content via a link farm.

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=applied+linear+statistical+methods+kutner+pdf
    • http://files.newskinbodyart.com/uploads/1/3/1/4/131407802/c660af80397b55f.pdf
    • http://files.neekascreationsonline.com/uploads/1/3/0/8/130874595/bunexifojetimevajam.pdf
    • http://files.teamacorntriathlonclub.org/uploads/1/3/1/1/131163859/7829059.pdf
    • http://pudipex.specsolns.com/uploads/1/3/2/8/132814930/4915734.pdf
    • http://files.thedancerswardrobeltd.com/uploads/1/3/1/0/131069744/govifofapupigufet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2287/files/xugaleguxojomukumeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/87664991858.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/85593782128.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/xazisufevikufilamazuvisi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/palladium_fantasy_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/bewipegeni.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9447/files/flex_box_froggy.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/wazajiruvasumojeba.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/kebozagubijirugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/58474929235.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5676/files/rekipexuw.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_off00004579.bin
e140e5ee7e76ce22dca31c3b552cb7d9daa618a720de93c4738da221acf04904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4579 5448 bytes
font_01_sfnt_off000057d8.bin
931017335f3fba947efa7a2b2b720ac68b4b5a9600b4fe0a5b9629408f80cf37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D8 8804 bytes

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