Malicious PDF — malware analysis report

Static analysis result for SHA-256 119be12dfee62035…

MALICIOUS

PDF

40.2 KB Created: 2020-08-29 21:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36d4d22767ceb7884dd81960334cc254 SHA-1: f48432db662ff24fa38cfb3430355ff19692ed60 SHA-256: 119be12dfee6203581f700b125c0e29a25a51af2e453626fb6491206a13d607d
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/wix?keyword=samsung+vg+kbd2000+manual, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to this URL and other PDF links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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/wix?keyword=samsung+vg+kbd2000+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f4e04f21505544158beec3e0f7d96925.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c0483a44233446fa93c17cea1211680.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cd6842a3f7347c39226023b7cdfbb40.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobuwavidojanunixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0076/6369/files/94094496082.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/65195074988.pdf
    • https://cdn.shopify.com/s/files/1/0436/6640/7589/files/81683281362.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/43847478795.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/23386040216.pdf
    • https://cdn.shopify.com/s/files/1/0435/3451/6376/files/genki_ii_textbook_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/5778/2694/files/subuzupajexaguvafa.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_off0000482a.bin
dc101740e7d8432c3e4cc31a6ee4a4a4819fd0d991e2b70be5fbafbaab0512cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x482A 5688 bytes
font_01_sfnt_off00005b74.bin
e771f26c40044fc8231c86f98434d4ce76294dbfcc2485fef5284b87d42f5695
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B74 10300 bytes
font_02_sfnt_off00007ee7.bin
d1a4c78ef556d8252eaaeead95fd6e0540edb04596780bf3770e55fda0b1f776
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE7 16196 bytes