Malicious PDF — malware analysis report

Static analysis result for SHA-256 1397a0fb1a9fb4f6…

MALICIOUS

PDF

43.5 KB Created: 2020-08-02 13:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 094e6ec5d5d2699a62042ccb026982f4 SHA-1: f91bbbc4ac528a4db8836e8dcce22375f149bb9d SHA-256: 1397a0fb1a9fb4f6e4110b0efa899be6a5706766bbde85590f5d7b20ae8b253a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector at 'https://ttraff.cc/pify?keyword=art+a+brief+history+5th+edition+pdf'. This suggests the document is designed to trick users into visiting potentially harmful websites. The presence of many Shopify links, while some are benign, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=art+a+brief+history+5th+edition+pdf
    • http://files.amistadschool.org/uploads/1/3/1/4/131483138/0c6124aaa65.pdf
    • http://files.quekjiaqi.com/uploads/1/3/0/8/130813923/xasuxudeso-zuvem-xoganuranoludoz-suwonu.pdf
    • http://files.krisbenyopottery.com/uploads/1/3/1/3/131379396/0bd30.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5089/2440/files/zovovuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/writing_better_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/lusapalisonozuwewali.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/xugagutaresasubov.pdf
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/bovodopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/18854490673.pdf
    • https://cdn.shopify.com/s/files/1/0440/7354/9974/files/61724399708.pdf
    • https://cdn.shopify.com/s/files/1/0434/2258/0886/files/14787481862.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/33034963112.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_off00006b56.bin
e4856b4506ce8982966731843c9f00e2e7d217c0cf0ee786162c867681a68da9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B56 5452 bytes
font_01_sfnt_off00007de6.bin
6bae7259e9d3ab9e5bc7b038ce502463c3d409e88be4efddc141015e51a03d98
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE6 10616 bytes