Malicious PDF — malware analysis report

Static analysis result for SHA-256 e918a2b0d175581c…

MALICIOUS

PDF

60.0 KB Created: 2020-08-30 18:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2237bccc48be080460e773c8c62a269e SHA-1: 97ef98ee21ab0b5a50ef45de84247126460dada1 SHA-256: e918a2b0d175581c4c0d59f5dbfef91bc2b86ceac28bccfb8e6e9428a283ae58
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL, https://ttraff.ru/wix?keyword=bad+blood+secrets+and+lies+in+a+sili, is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains this URL, suggesting it is the intended lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bad+blood+secrets+and+lies+in+a+sili
    • https://static.usrfiles.com/ugd/b8c837_00fea06aa38c4ce8bc87f5a3bba3301c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4a197002e1a48ee833a6cc440b77a39.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7bd71d33bf44ce9a13624c588a20dac.pdf
    • https://static.usrfiles.com/ugd/9734e7_5f51375ea6f342ac91f765306462ae05.pdf
    • https://static.usrfiles.com/ugd/b8c837_31e17141cec84f3680680dc50bba2ba8.pdf
    • https://static.usrfiles.com/ugd/de65f7_81f54555dba74921b20923af497e0488.pdf
    • https://static.usrfiles.com/ugd/b8c837_11cf90d9264a4d69bbb1320605358a50.pdf
    • https://static.usrfiles.com/ugd/a59130_5b4fdb2681804f7daf826c8ffd91c582.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8529f23e5684facae91fdc610ea223f.pdf
    • https://static.usrfiles.com/ugd/b8c837_558be57c9b444ec29405b26a0a826d00.pdf
    • https://static.usrfiles.com/ugd/4c1554_43c15572b9594428bc8883cc4e35f7a7.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5883/files/gisezivadufe.pdf
    • https://cdn.shopify.com/s/files/1/0454/8021/4678/files/archimate_3._0_specification_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/fekupuzixosobobidewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/24630691223.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_off00009fc0.bin
c6a3956b31407d39382cd6d32ce831faa0bd6021756f9f7a5a07ccc836464bd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC0 4908 bytes
font_01_sfnt_off0000b06a.bin
541cd6dbe4b73ba2c7eb4eec6f30d34b698c85dacb6d3061c1702596b0eeb7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB06A 10488 bytes
font_02_sfnt_off0000d467.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD467 4324 bytes

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