Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab471992e0425fb…

MALICIOUS

PDF

49.1 KB Created: 2020-08-25 03:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad1779b298743148750afcb39ed1a6a8 SHA-1: ce32ffc50b061cc2521c037d01b82662e1bca6cb SHA-256: 5ab471992e0425fb0cb195290d81685e219d5613d23dd6ce855099da78d53e8b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body itself is heavily obfuscated but contains the same redirector URL. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or phish users.

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.com/pify?keyword=baazigar+o+baazigar
    • http://files.lavadaslens.com/uploads/1/3/1/4/131482823/2456372.pdf
    • http://wuwoj.dispensinglink.com/uploads/1/3/1/4/131407815/52b0a568fbaebf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/93464177012.pdf
    • https://cdn.shopify.com/s/files/1/0433/7654/1857/files/rpg_maker_xp_pokemon_games.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/22138008060.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4940/files/13260236171.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/89698413581.pdf
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/90827523510.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/1998_road_king.pdf
    • https://cdn.shopify.com/s/files/1/0463/2913/5265/files/psp_iso_game_psp_cdromance.pdf
    • https://cdn.shopify.com/s/files/1/0440/7640/0792/files/wafozexazuwaf.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e38.bin
d407dd65b42dd40934a57f5557d3d649ae6d992207c86dbb730ac8b43a477dbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E38 4880 bytes
font_01_sfnt_off00007ee7.bin
88c0e2cc7fc0ff406ce965b8ab1677343f29c85eea74aa682b1d4970965d44d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE7 10376 bytes
font_02_sfnt_off0000a2ab.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2AB 16164 bytes