Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f2878aca22f9d8…

MALICIOUS

PDF

44.9 KB Created: 2020-08-02 16:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eb54c035f25c2d320a46e7048d0e7ea SHA-1: 47d445e99b719abc9191073c75017522bcff96e2 SHA-256: 78f2878aca22f9d84b8a0622163ef8fe068c1adbd7347712bd4081764b7682bb
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.com'. This indicates an attempt to direct the user to a harmful site, likely for phishing or malware distribution. The presence of numerous other PDF links suggests a link farm or a method to obscure the final malicious destination.

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=creation+kit+skyrim
    • http://files.foresitemapping.com/uploads/1/3/1/4/131437291/4ef8228.pdf
    • http://files.10independenceblvd.com/uploads/1/3/0/7/130776611/gipesezefinu.pdf
    • http://files.smockadoo.com/uploads/1/3/2/6/132681210/gokojuwukam.pdf
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/xogukudalit.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/giwiduxamokotarejemopibud.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3667/files/linexexunamanuzelenisabev.pdf
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/vaboxosisevemugebafeluv.pdf
    • https://cdn.shopify.com/s/files/1/0440/8875/4328/files/puwif.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/vedifawaratuxamoxiduwiki.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/kanexin.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/d_d_5e_conditions.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/33355738234.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/jawifagazamatovobod.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/solegirobaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/9804634466.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/23176284978.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_off0000729f.bin
fb1b23dd9389100771d41e40796013b8883adfbdefbd330b059ca426533d95e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 4868 bytes
font_01_sfnt_off0000831f.bin
7f1ae55a6597d6f0409ccf7420ab6e45033735828ae1ac8d0dcf0a72249b786c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831F 10372 bytes

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