Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1357a51691edeb…

MALICIOUS

PDF

47.0 KB Created: 2020-07-08 12:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 208d7ef16ea45f4c25381d8109c89feb SHA-1: 163506c32a271d372efbb73a0655c886e20b57d3 SHA-256: 2f1357a51691edebd50e0263c0d60f3257b994ad65ec211a772c2783d24054f5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link directs to a malicious redirector, 'ttraff.ru', which is likely used to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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/wb?keyword=convert%20fraction%20into%20percentage%20worksheet
    • http://files.stitchedwithcare.com/uploads/1/3/1/3/131383624/dowumi-wefudazebukop-wivavin-tajewowe.pdf
    • http://files.beyondstrengthmaine.com/uploads/1/3/2/6/132696280/lamutesirabogurofaja.pdf
    • http://files.exquisitetastebydonna.com/uploads/1/3/1/4/131438840/fawoxoxeji.pdf
    • http://files.browncountyhumaneshelter.com/uploads/1/3/0/8/130873830/semitakugum.pdf
    • http://files.gothyway.org/uploads/1/3/0/7/130739769/f639fa088f4.pdf
    • http://files.antoniodavidsinopoli.com/uploads/1/3/0/8/130873907/4090271.pdf
    • http://files.xavierravel.com/uploads/1/3/2/6/132683088/5276555.pdf
    • http://files.vibrant-energies.com/uploads/1/3/0/8/130873907/nomadu.pdf
    • http://files.kelownaplumbingsolutions.com/uploads/1/3/1/3/131398156/vudejinu-kedav-benosagulita.pdf
    • http://files.statebirdtogo.com/uploads/1/3/2/7/132710687/a1b067.pdf
    • https://xoruwojuki.files.wordpress.com/2020/07/zonifixix.pdf
    • https://zorozoxagis.files.wordpress.com/2020/07/zekikuvesiburiwesorag.pdf
    • https://pimuzuvaduz.files.wordpress.com/2020/07/75767047493.pdf
    • https://lonisip.files.wordpress.com/2020/06/wuwisisegod.pdf
    • https://mafegazavete460328079.files.wordpress.com/2020/07/datosobepaxepib.pdf
    • https://nogekidopof.files.wordpress.com/2020/06/20623658473.pdf
    • https://popibilowon.files.wordpress.com/2020/07/gatirigiwenow.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_off00005e14.bin
942060fd72c76579d3988fb6513d4f99eb2e507c7f389e0bf81eaebb003f888b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E14 5272 bytes
font_01_sfnt_off00007012.bin
9e9e6e2f2506cf0306e79535b92d819e30e31de0d79cd26c0d633f844602167c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7012 10164 bytes
font_02_sfnt_off000092f1.bin
f22a829256be0694de948a942c49a8ed32f5400f413fb3c959ccb3fab776b100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F1 18080 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.