Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2daee6a4b77325…

MALICIOUS

PDF

45.2 KB Created: 2020-07-26 12:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 922102e991218ed7b4f201393da69b3d SHA-1: 08e2769426b2d9919d4680789152cb063e9c6ca3 SHA-256: 6e2daee6a4b773255c1a55344d79c6278b7ffb9190fce38ef1bd23e86e7ce0be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. It also hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to distribute additional payloads. The ML classifier strongly indicated maliciousness.

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=curso+de+calefont+ionizado+pdf
    • http://files.anikasten.com/uploads/1/3/1/4/131453636/7488570.pdf
    • http://files.oztriathlete.com/uploads/1/3/0/8/130815381/0c13b35d3bbfa4.pdf
    • http://files.madisoncommunityband.org/uploads/1/3/0/7/130775261/tomibesid.pdf
    • http://files.cancercure-fund.com/uploads/1/3/0/7/130739340/2000335.pdf
    • http://files.robertmckayjones.net/uploads/1/3/2/6/132681453/1388251.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/9920790697.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/8034420331.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/32691744439.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/zanagugakinaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/9850/4354/files/82522610184.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/22073932249.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0408/files/gawiwoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/wuwizurojijezifamokapoker.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/64633862536.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/kawutitafidivima.pdf
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/mumuderazunexinuxonuxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/33940701711.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f2a.bin
b6c0dd3898a64db361bfafd57ab99ba10b81c992023c05882c81b41c1927b2d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 5104 bytes
font_01_sfnt_off0000809d.bin
f878198d8514d42d0e10621ce04507039a9f249a51d9cb20523a8dd06f7a3630
pdf-font-stream PDF embedded font (sfnt) at offset 0x809D 11704 bytes