Malicious PDF — malware analysis report

Static analysis result for SHA-256 a490f6fa5b902d27…

MALICIOUS

PDF

36.0 KB Created: 2020-08-08 00:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8174e9f635259ee441c216069ee02a37 SHA-1: 7c8c5dc78dec3060835e18addd1906610df7ef99 SHA-256: a490f6fa5b902d27cd37aff5a4e06befb84b0be4ffc42060da0d6064aff821d5
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=bodybuilding+workout+photos+pdf'. This suggests the document is designed to redirect users to malicious sites under the guise of providing bodybuilding workout photos.

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=bodybuilding+workout+photos+pdf
    • http://files.northgeorgiacern.org/uploads/1/3/1/3/131378932/2059239.pdf
    • http://files.trickdogu.com/uploads/1/3/1/4/131437474/xefolawikig.pdf
    • http://files.shsbusinessclass.com/uploads/1/3/0/9/130969003/xowasa-sanovefokeweja-sofak-sesarejikupuku.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/29011702032.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/wikovelupetotamofotasexo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0231/files/avionics_technology_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/coriolis_acceleration_derivation.pdf
    • https://cdn.shopify.com/s/files/1/0436/2783/9641/files/41401049605.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/koziz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/charat_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5151/files/82565664075.pdf
    • https://cdn.shopify.com/s/files/1/0435/4854/1087/files/arinc_429_specification.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/42593969101.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_off00004df9.bin
ec900252a447f2eaf0426d1b6ab93b59b68d54ec36160f2da980a50be94d813c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF9 5540 bytes
font_01_sfnt_off000060ea.bin
b4204c5f6e472a74165daaafc83e182e9cd4e0a1416a10338beca3cc325d37ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EA 10136 bytes

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