Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9be657141b7b0e7…

MALICIOUS

PDF

45.7 KB Created: 2020-08-29 22:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbce769854296a205244d7db188baae1 SHA-1: 7e93dfb6017f6e9979419f5c883cecb546d0bdc7 SHA-256: f9be657141b7b0e733688cc5c2241b83d7560e2321bc5249ce44d5437982e5df
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to its inclusion of a redirector link pointing to a known malicious domain. It also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/wix?keyword=the+division+gear+recalibration+guide, which is likely used to lure victims. The document body itself is heavily obfuscated but contains references to the malicious URL.

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/wix?keyword=the+division+gear+recalibration+guide
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/42666077046.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/sesawax.pdf
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/adobe_acrobat_editor_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/197150717.pdf
    • https://cdn.shopify.com/s/files/1/0461/5539/9331/files/36245562389.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/nuxaz.pdf
    • https://cdn.shopify.com/s/files/1/0463/5459/6001/files/mirroring360_airplay_receiver_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73792904944.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/35747438348.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/60388795151.pdf
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/38326396413.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9789/files/dalirubuxemebegato.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/azitromicina_600_bula.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/paduromafob.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_off00007623.bin
3bae1923f1b13c66a12bf3af6589e7c51d6e0feb277b2883e4d731201fb2b4fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7623 5352 bytes
font_01_sfnt_off00008850.bin
01853f7e84edacdfe46a9685455aa34b45add28fc7cd12c1adbeafb6be0a7d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8850 9912 bytes

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