Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc86ec2f4951f0f…

MALICIOUS

PDF

40.6 KB Created: 2020-09-16 23:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2783c90bc15a798bc1ea2b5a1751912 SHA-1: 8aab403399d04c59de5e213cc5892320fd499535 SHA-256: 3cc86ec2f4951f0f0adde8299978f431e882fb03441773f61975297ff1716717
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a link farm, with multiple embedded URLs pointing to various PDF files. One of these URLs, 'https://ttraff.me/wix?keyword=briggs+and+stratton+500+series+parts+manual', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this same malicious URL, suggesting the primary intent is to lure the user into clicking the link, likely leading to further malicious content or exploitation.

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.me/wix?keyword=briggs+and+stratton+500+series+parts+manual
    • https://311a4c29-c7dc-4879-bf9b-eb90bf4edb16.filesusr.com/ugd/cdfdba_368c457cd90a4c4694cf6d79d9c69644.pdf?index=true
    • https://b3182f06-b5cb-4cfa-93bf-51f3fc05caca.filesusr.com/ugd/35f767_a578d5c4bb4f443685d279a04f22c2de.pdf?index=true
    • https://e853f82f-0fd3-41bb-a3e5-eb98cdc71071.filesusr.com/ugd/d162e3_ea3187e741464fa582e59652807adf83.pdf?index=true
    • https://b4549868-0eeb-48dd-86f1-8d98a2f1feb2.filesusr.com/ugd/5926b4_b44766dd659f40c0bc93a1f08d4df072.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/doubly_linked_list_destructor.pdf
    • https://cdn.shopify.com/s/files/1/0435/5257/1555/files/68453341839.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/giviwawonuxomewotisokig.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/23325341127.pdf
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/96476640286.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/wosopaxajisofubuxafi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/41472353708.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_off00005f33.bin
fa4041bafec360bd05d8beef369161d133a349a1c2a580eec801721368b2b30d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F33 5596 bytes
font_01_sfnt_off00007220.bin
6865feb15bf29b9328be102a361fa480401b53267f3c08fe9d854ec93794a5cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7220 10428 bytes

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