Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c2efb795a390b6…

MALICIOUS

PDF

46.0 KB Created: 2020-07-08 19:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaffafa1ba3178a4d108563d048f309d SHA-1: 68c304b2ff2ebf747a7e3192349abc7f2aaae847 SHA-256: f6c2efb795a390b6d7e6b86063f940237f26cf950289e6c254e6b8bdbe374f93
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious files. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identified a link to traff.ru, a known malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a mass external PDF link farm, suggesting a tactic to distribute malicious content or engage in SEO abuse. No scripts were extracted from this sample, but the primary attack pattern is the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=les%20ensembles%20de%20nombres%20pdf
    • http://files.mr-stevens.com/uploads/1/3/0/7/130776864/zoxakaso.pdf
    • http://files.mrsararadian.com/uploads/1/3/1/4/131453676/725d0ad5d8b20d.pdf
    • http://files.thingsnaturaltobago.com/uploads/1/3/0/7/130739375/6d5c78.pdf
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
    • http://files.kathyconfer.com/uploads/1/3/0/8/130813409/wozujulakupebi_xanajosunigi.pdf
    • http://files.lorraineparishwriter.com/uploads/1/3/0/8/130873870/lobojixo.pdf
    • http://files.geraldinepilgrim.com/uploads/1/3/2/8/132815346/6780435.pdf
    • http://files.marsjoyofpainting.com/uploads/1/3/1/6/131606127/1986964.pdf
    • http://files.nokillhuntsville.com/uploads/1/3/1/4/131455883/jalupi.pdf
    • https://zekofanakem.files.wordpress.com/2020/07/63120313353.pdf
    • https://daxetojip161513793.files.wordpress.com/2020/06/72623181323.pdf
    • https://pinuraliwa9571753.files.wordpress.com/2020/06/ribabipabam.pdf
    • https://relotudop.files.wordpress.com/2020/06/41223380127.pdf
    • https://wivezojajut.files.wordpress.com/2020/06/dopufajixawopibetimimo.pdf
    • https://jepanabukam.files.wordpress.com/2020/06/ritigofovavufimenasukoxo.pdf
    • https://detekekud.files.wordpress.com/2020/07/78339170892.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.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_off00006278.bin
0199af7289033928afb145db993ce22358740e751cb6332c0ac2e3f3739dbd1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6278 4720 bytes
font_01_sfnt_off0000724a.bin
238cb0d15fab897d0b2a15a929422e6b464c0ebb1d7ebad28505fc5f35b93825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724A 10384 bytes
font_02_sfnt_off00009431.bin
b6f255e930c99f47bdae02a5172afc6b20c830d00a176f41f9928999b07a02e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9431 16108 bytes

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