Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb1025b69af9746…

MALICIOUS

PDF

36.6 KB Created: 2020-09-07 21:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f39b70ba200b613458e2227da5f3c4da SHA-1: 7c776b3ffe077e23961e1b1403f7e6b252b92ebd SHA-256: afb1025b69af9746de5fc8b4f3d7ccdb68847edda2f607ad3eb301b96398a36f
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.me, disguised with a keyword related to Telugu audio songs. This suggests a phishing or scam attempt to redirect the user to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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.me/pify?keyword=janapada+geethalu+telugu+audio+songs
    • https://static.usrfiles.com/ugd/0d2908_830258105f8a4a809a70e020ea01e516.pdf
    • https://static.usrfiles.com/ugd/96bf9d_1c1e0de0c4144600b19843132a0b0ccc.pdf
    • https://static.usrfiles.com/ugd/564d2e_7c7f2ea4b0f940d19da014b22cb2f50d.pdf
    • https://static.usrfiles.com/ugd/d01287_17ad2bd06a9e4aadb32969b61fab0beb.pdf
    • https://static.usrfiles.com/ugd/39a0fd_27f2b869fc614a5ba40765af89b70283.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/63087150615.pdf
    • https://static.usrfiles.com/ugd/90d19e_430829ecf90e49db884c4a6afc9636f5.pdf
    • https://static.usrfiles.com/ugd/cdb50c_65890c388808473bbbc54ba7a07c9bb7.pdf
    • https://static.usrfiles.com/ugd/5f226e_e272c65dae0c44adb5313c05202b68ce.pdf
    • https://static.usrfiles.com/ugd/e00bd3_22675016eb2e46e1a9df4313a60b76f1.pdf
    • https://static.usrfiles.com/ugd/ffe0d3_186b87a59bf44321bbf74cc1b664ac38.pdf
    • https://static.usrfiles.com/ugd/4ca7f5_da6b605bc88a4a01b9fc2cf990a6bd10.pdf
    • https://static.usrfiles.com/ugd/36f25b_87eeae5d589b422c925b5c1973f7848d.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_off000045af.bin
367dab3199b06d9c6640541a3e129aedd7d618deb421683d755f764a57736af3
pdf-font-stream PDF embedded font (sfnt) at offset 0x45AF 4996 bytes
font_01_sfnt_off0000569f.bin
f2c9b303eac12a4df560fb70961e7cae20829a79cea805c316bd2a5226c5ed6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x569F 9604 bytes
font_02_sfnt_off0000778e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x778E 4324 bytes