Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb04cee7deff30dc…

MALICIOUS

PDF

119.2 KB Created: 2020-08-31 05:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4016ce0f098f3e9693c5fe014be880c SHA-1: 8eee318eba4cd083957627176373a74be9e63ace SHA-256: cb04cee7deff30dc324ec374c81ec65e85c84471701babe60fc25a9f0f7cd5bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link to 'ttraff.com', which is known to host phishing or malware distribution pages. The document also includes a large number of links to PDFs hosted on 'static.usrfiles.com', suggesting a link farm or SEO poisoning tactic to increase visibility of the malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/wix?keyword=%25EC%259C%2588%25EB%258F%2584%25EC%259A%25B0+10+%25EC%25A0%2595%25ED%2592%2588+%25EC%259D%25B8%25EC%25A6%259D+%25ED%2581%25AC%25EB%259E%2599
    • https://static.usrfiles.com/ugd/37428b_20caea80afbd405283111f77556737f5.pdf
    • https://static.usrfiles.com/ugd/63d3ad_58494e078b27413ab368865e37cf4e2c.pdf
    • https://static.usrfiles.com/ugd/71fd01_2afc4ab386d24f17bb542c3f875ad003.pdf
    • https://static.usrfiles.com/ugd/b8c837_96ca8690fda74c27bbbcaf388d325fc6.pdf
    • https://static.usrfiles.com/ugd/078c79_9cc1e193f3a6491e9961e930c5616921.pdf
    • https://static.usrfiles.com/ugd/b8c837_b871efd3dcec4427aee30470de39ed42.pdf
    • https://static.usrfiles.com/ugd/078c79_00e8d786e009407c83b300011f4ba66d.pdf
    • https://static.usrfiles.com/ugd/0c4177_77a7e1e6e50b4b2cb7092650836041b3.pdf
    • https://static.usrfiles.com/ugd/d775a9_dc7c3ba6851c4ba19a77baadee5bc84d.pdf
    • https://static.usrfiles.com/ugd/b52961_590f5033b54e40db99a0a0a2c440ec9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_693ee6fde0234f50981d66cb7a8eb40f.pdf
    • https://static.usrfiles.com/ugd/df4650_7db6c628603b49b990719eaa5b3aecf9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ebc31fccf7147f5b53ae8a6e3b817d9.pdf
    • https://static.usrfiles.com/ugd/0dd040_ab7a5aaeb7c047fdbefdcfab2c080eb6.pdf
    • https://static.usrfiles.com/ugd/a382ee_76c7215ea067429a818055dc52a99042.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_fcaffff35f3e4dbda14ef6503ce8d169.pdf
    • https://static.usrfiles.com/ugd/77d535_efcb1f2833c9407da0cc04cbf4b4900d.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdc8.bin
f51bfbd22547005dd6f4564347b9133fa9ec28dea2356c7eda66caa05512fca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC8 62836 bytes
font_01_sfnt_off0001731c.bin
3f4da949279690cce0ececaaf1937c22d9ad69ae39468d45c6ef060cd33aefc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1731C 4256 bytes
font_02_sfnt_off00018211.bin
102c4579b85e15a5b3258b4b89dcd182e0c3479eb2ad3480e5cc7e745e46f9d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18211 4260 bytes
font_03_sfnt_off0001909e.bin
915d7da5e54c41388156a50e3c54b3f530152045c9e23fed0d4bbe105cedfb97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1909E 11564 bytes
font_04_sfnt_off0001b6b4.bin
a313b24da4090b5f304744a95c3a41fb7daacc4794897af84774029b22dee273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6B4 16120 bytes

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