Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ccb6c54345fbce9…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 15:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 382c4c2036fbbe05430fc1d2959172c1 SHA-1: 15f4239d19bb40598d7b227faf26b895f812684e SHA-256: 8ccb6c54345fbce91b8cef6c9f9c18f5a75dc6ec573721500facb4f0c23c6b3c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The primary malicious URL is likely used to redirect users to a phishing or malware-hosting site.

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=hunger+games+minecraft+indir
    • https://static.usrfiles.com/ugd/b8c837_1f3231aef4ee41f991438e683adcb6bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7cc99874ed64601ab3f186fd024d79d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d59d9824acd44759d7d5674e6c53952.pdf
    • https://static.usrfiles.com/ugd/affb4a_2ff6690f442347dca23a4599f71b2799.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4506f7c46214facacc6fc0c8b826402.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/49746935551.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad56bf27fbdd4f50aa7d76d2fb30a763.pdf
    • https://static.usrfiles.com/ugd/9904c2_872beb975106434fa211a05c279c80c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_de06e31410784dde8635aea42a71b47c.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc7f93e8b811467cb0ed3ad494484435.pdf
    • https://static.usrfiles.com/ugd/18f527_9bb2c8b2083548d4b6ef5efb63d7f4df.pdf
    • https://static.usrfiles.com/ugd/362633_26fec0a010584a45937c64527bd7a5c7.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_off0000664a.bin
fccc3f52e4bf44228053275b07f0ac81d83c0aea35c1453954af9401b22f3199
pdf-font-stream PDF embedded font (sfnt) at offset 0x664A 5044 bytes
font_01_sfnt_off0000774b.bin
f88ccb954250b314823e8a97ebdf8bba6616d03ed6cd122c5b110a26a1e074b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 10568 bytes
font_02_sfnt_off00009b2a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2A 4324 bytes