Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d3a410efe402ad…

MALICIOUS

PDF

40.0 KB Created: 2020-08-02 06:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deaba02b1870cd1cbdf94e9c051cfeef SHA-1: 9825f9d53661aa1a95df789fa9ddb504cf35ce1c SHA-256: 69d3a410efe402ade2480668968a54dc0b07c5aa13aaa8b99d1ad5bf2bcf334c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content. While no scripts were extracted, the ML classifier and redirector heuristic strongly indicate malicious intent.

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/pify?keyword=kittens+game+religion
    • http://files.prideofmillcreek.org/uploads/1/3/1/4/131455328/508a24826b.pdf
    • http://files.theventhpc.com/uploads/1/3/1/4/131437680/sagojeg-dedakoli-bimuwotoxugav.pdf
    • http://files.danceawaydesigns.com/uploads/1/3/2/6/132695428/gojerujivazaxagixi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/rosumepunodapadewulubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9071/4532/files/rekosigobes.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/kidopajobewajapemil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xixuvedivikeror.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/87737751034.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/jipiwizojofiribovoxesa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/gifilejepekib.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9069/files/83090214636.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/28580304633.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/66152958015.pdf
    • https://cdn.shopify.com/s/files/1/0431/8029/4298/files/52554963393.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5876/files/fetif.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_off00005e63.bin
3916cb72ae57e29817572bd45ba3e856370af6b44424289cee6ad6d42dd0074b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E63 4976 bytes
font_01_sfnt_off00006f3c.bin
f168fe0511b28f274f51a5e1cd99091dc9858953b829d5e4ff5fb16c7a1f87d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3C 10652 bytes