Malicious PDF — malware analysis report

Static analysis result for SHA-256 7396fa42d6b18e2c…

MALICIOUS

PDF

42.8 KB Created: 2020-07-30 23:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bbe607aaca0e508c4616397d34816a2 SHA-1: 239ffbe012fb9546bfd16258d6907b615658fcb6 SHA-256: 7396fa42d6b18e2c3c9f2fef208dc21b3eab3bfd1663c7b99e2761dffed3dfac
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm strategy. While no scripts were extracted, the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent, likely related to traffic generation or SEO poisoning.

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=architecting+software+intensive+systems+pdf
    • http://files.southerncoloradohrc.com/uploads/1/3/2/3/132302749/wejiwe_tadaruv_wavowiw.pdf
    • http://files.mccallumjones.com/uploads/1/3/1/8/131871633/wonojupi_fanezeg_tepizopim_ninogofe.pdf
    • http://files.hollybeckley.com/uploads/1/3/1/4/131453998/9261414.pdf
    • http://files.pamelapalmadesigns.com/uploads/1/3/0/8/130813427/bosagosokulexutu.pdf
    • http://files.meganboonedoula.com/uploads/1/3/1/4/131409761/saburufixi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/pusidizisumeduvolirimuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/12501074494.pdf
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/49181182771.pdf
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/lowud.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/54637640892.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/49988139330.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/puguz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/58352330370.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/84401666589.pdf
    • https://cdn.shopify.com/s/files/1/0429/3804/0487/files/bugenuvegune.pdf
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/14606408358.pdf
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/65647450525.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_off000066cc.bin
b11be5158e24963603a7b404583e7dd8a7ac7f1cfda042ede6802e092df428f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CC 5568 bytes
font_01_sfnt_off000079a4.bin
ea04bec4260aae18103b445114f13db0bc6f72d67a4884dea774c4433c156a3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A4 10904 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.