Malicious PDF — malware analysis report

Static analysis result for SHA-256 be92d62190fa6332…

MALICIOUS

PDF

40.0 KB Created: 2020-08-31 23:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa959a7e374779239b1c4805ba268948 SHA-1: 3aea885381ead806afba09b26294560a7de82423 SHA-256: be92d62190fa6332337dedf5e9f2a1a79f1bf47fef4adf50e0152ce1ab4ac6b0
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to 'booty farm mod apk 3.6' and the malicious URL, suggesting a lure to download potentially unwanted or malicious software. The presence of a large number of external links, many pointing to static.usrfiles.com, indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination.

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.link/wix?keyword=booty+farm+mod+apk+3.+6
    • https://static.usrfiles.com/ugd/b8c837_2b14eb682f704021adc5dfbf9910e8c5.pdf
    • https://static.usrfiles.com/ugd/0aab01_96d06b4cd74c424d8796b8f24e339b0d.pdf
    • https://static.usrfiles.com/ugd/078c79_ebb960afe0b24cbdac4c5aa6b0287820.pdf
    • https://static.usrfiles.com/ugd/98857b_841f4793f91a4a069f965fdc38976153.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec75e064e67140e6a819ade02fb77d06.pdf
    • https://cdn.shopify.com/s/files/1/0440/7692/5078/files/hydrazine_sulfate_msds.pdf
    • https://cdn.shopify.com/s/files/1/0439/1449/4107/files/smartsheet_team_pricing.pdf
    • https://static.usrfiles.com/ugd/b8c837_09866f46679549229b369d8bef85c2c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c56ff02bb8747a39c6d409075c3bdb5.pdf
    • https://static.usrfiles.com/ugd/37428b_0a8ae18aff4b492b90c85a127c4e0759.pdf
    • https://static.usrfiles.com/ugd/d5d855_e5e42c0da261405f8563cc1dfa520b6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_549123141001403491d6a258a04bf734.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_off00005e24.bin
e5e81f69ee90396c95425f938751583e33ad3670fc810cee0ad7ffdbc9a5de0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E24 5540 bytes
font_01_sfnt_off00007103.bin
c2a749e4daf4bdbc1b85582697b26d16d1c2c872af9d696ee9f0b69c494b265c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7103 10112 bytes