Malicious PDF — malware analysis report

Static analysis result for SHA-256 896bd6a29589f0ad…

MALICIOUS

PDF

83.3 KB Created: 2020-07-31 13:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7fce7b5a54f34f45a9af4f6c91997cb SHA-1: 0bac10fdb50684cad1b71b63f989604a05ff5cee SHA-256: 896bd6a29589f0ad68ecaf2ab056a14b6c99f9d6b2948ae80332267a89038f38
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Blade of the Immortal manga pdf'. The presence of multiple external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content or traffic. The ML classifier strongly supports the malicious nature of this PDF.

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=blade+of+the+immortal+manga+pdf
    • http://files.jonathanedgingtonwriter.com/uploads/1/3/0/7/130739674/963e69154d672.pdf
    • http://files.championparty.com/uploads/1/3/1/4/131483336/2582240.pdf
    • http://files.stockpilesavings.org/uploads/1/3/1/4/131437889/5688745.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/50242072613.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/ludafikovigikekojefived.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/xirotokokopanu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6773/files/juzajigepebegenevuzizar.pdf
    • https://cdn.shopify.com/s/files/1/0437/6241/7825/files/fodujame.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/lanurek.pdf
    • https://cdn.shopify.com/s/files/1/0434/6799/7344/files/92089321765.pdf
    • https://cdn.shopify.com/s/files/1/0428/5923/3443/files/banimijivevidararolaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/59423699796.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3366/files/fabebez.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb7c.bin
6baa0c683dd0dda24a203eff80b26c2104e00aa72f09701bcd1ed5cbd71636ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7C 21164 bytes
font_01_sfnt_off0000fe2a.bin
82b63fc913c8dae1d3383472fc85d079b6551297d438ea7939e612cd515cdee7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 5112 bytes
font_02_sfnt_off00010f63.bin
c40fabbbdeb71a74b54ba19578c3b50d89b9dcff55bf68d61b779a311791182b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F63 15688 bytes