Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad7dc2483fb2f56…

MALICIOUS

PDF

52.7 KB Created: 2020-07-24 01:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13393de2ff7c268bf25eab6744fa83af SHA-1: f96658eaebe657a8a43779a5051f89e2e2a26fbb SHA-256: 0ad7dc2483fb2f568baf42f565aea10e5597f529f4ab9655623471591de5e6c4
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search results or distribute content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious 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.com/pify?keyword=kamaiyan+song+aslam+ali++mr+jatt
    • http://files.biggsbassethounds.com/uploads/1/3/1/8/131857071/84fb7a2093dbc.pdf
    • http://files.libertybiosecurity.com/uploads/1/3/1/4/131454106/5d666ecdc6e79.pdf
    • http://files.wigitagain.info/uploads/1/3/1/3/131384374/09b67a724584.pdf
    • http://files.mobilemechanicmemphistx.com/uploads/1/3/0/9/130969405/sejom_wazozoduwave_mipeterunofa_fawale.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7343/7845/files/5977834198.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/monopuzakiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/wojilinogitewajanari.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puliwaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/doriwego.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/vuxavimikelazonidedagam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/gufamarojomaweromegojetov.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/zamuwuzez.pdf
    • https://cdn.shopify.com/s/files/1/0439/6243/3694/files/57921046562.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_off00008420.bin
c7a3d598bd1d6c2e9928c0d155e5ca6825fdbb4aecdfbeec2596d28fb476bc94
pdf-font-stream PDF embedded font (sfnt) at offset 0x8420 4820 bytes
font_01_sfnt_off00009469.bin
bad226bc879644647a659f9c659fb61feada676860eb25a1778301250b5c6e9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9469 14936 bytes