Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3d28505ede17b6…

MALICIOUS

PDF

55.1 KB Created: 2020-08-07 02:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05a11d6761d7879f9b013083ee915405 SHA-1: 68bdcf9419d50af6ca9b600fe12a1e6122a2d9d0 SHA-256: 3b3d28505ede17b655d117cb1d734894b6959a8591bb1ff4e099936956a04e00
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One critical heuristic indicates these links point to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=effective+go+pdf`. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links. This suggests a campaign focused on SEO manipulation or redirecting users to 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.ru/pify?keyword=effective+go+pdf
    • http://files.erc-events.com/uploads/1/3/1/6/131636725/molumoxazuruzebe.pdf
    • http://files.keepoh.com/uploads/1/3/0/7/130776619/f68a7333.pdf
    • http://files.blackduckmarinecanvas.com/uploads/1/3/0/7/130738836/natewareli.pdf
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/depression_causes_and_treatment_beck.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/vafimanibinobugapeko.pdf
    • https://cdn.shopify.com/s/files/1/0440/5500/3286/files/61692197115.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/gexuxuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/89485119659.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/nujotepuvomugutu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/20841911425.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/39659767268.pdf
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/80951352635.pdf
    • https://cdn.shopify.com/s/files/1/0435/2324/4191/files/schweser_caia_level_1.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_off00008c84.bin
b86e6cff0a046104f5cc0b11cd643b288a922d6aecdf3fbe804d4a6428908a29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C84 3672 bytes
font_01_sfnt_off000099ad.bin
3f789013b4a999681a74c2abb36915b80a39826b7518801fb66324600ba5b2b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99AD 4824 bytes
font_02_sfnt_off0000aa49.bin
9d80c42811e6e15712636c5a5fd9fc3f2b645b1a7369d44fb0a386b0aa1382d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA49 10992 bytes

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