Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b72d459eb4e96c…

MALICIOUS

PDF

44.1 KB Created: 2020-08-20 23:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2970ea232444e015e4a63a488390121a SHA-1: f92f7e387a1f447d0dd4a51d1470421770f153da SHA-256: 76b72d459eb4e96c7aa8077197cf4a225e61b84f541d2e990e0e5a0699c80f9d
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.cc, which is likely used to host or deliver a secondary payload. The document body also contains numerous links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt to increase visibility for malicious content. 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.cc/pify?keyword=stay+focused+app+block+pro+mod+apk
    • http://jaxojegod.grantavenueschool.com/uploads/1/3/2/6/132682467/451615.pdf
    • http://files.islandartandscreenprinting.com/uploads/1/3/0/7/130776218/8501561.pdf
    • http://musux.rng-studios.com/uploads/1/3/0/8/130814004/getukidetemobi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/7244/6626/files/kulajitev.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/dinewofak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58933331969.pdf
    • https://cdn.shopify.com/s/files/1/0429/6222/3263/files/bewetisafasitokow.pdf
    • https://cdn.shopify.com/s/files/1/0428/7633/8335/files/shooting_games_apk_data.pdf
    • https://cdn.shopify.com/s/files/1/0439/2576/6312/files/nafev.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/mulidowoxubufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/antigone_robert_fagles.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_off0000595d.bin
084d0ed4c94e335e28ff08564f948105a865df1df8ae21063f6345d7c37a01bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x595D 5712 bytes
font_01_sfnt_off00006ca7.bin
94f0254950bfcdbba31541e0e060aa4e8367250b412d1379e9f64e9214d1cdd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA7 9764 bytes
font_02_sfnt_off00008e40.bin
dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E40 16148 bytes