Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c46a2d34d022981…

MALICIOUS

PDF

34.4 KB Created: 2020-08-23 08:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e4096513fdde1adb424a43e3a6a82f9 SHA-1: bc377795870eee1ce01d33f712a007221ab4e5e4 SHA-256: 5c46a2d34d022981d666d6c8c63070e7d5898ceb705340399a3f6b769c17e1a0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a movie title and a URL that appears to be a lure. The presence of numerous external links, many hosted on Shopify, suggests a link farm or redirection scheme designed to lead users to malicious 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.ru/pify?keyword=bhai+bhai+full+movie+1997++hd
    • http://files.pavlahroudova.com/uploads/1/3/0/7/130739614/bedodetuduwitun_danojeru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/gorivaweniwometivojokol.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/77537935673.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/dell_latitude_5300_spec_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/57839610715.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/54112900572.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9368/files/44347214300.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/93797230679.pdf
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/west_african_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/da_form_5984_e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0429/1254/6975/files/95519892162.pdf
    • https://cdn.shopify.com/s/files/1/0434/5636/4711/files/noxigibesopudekiru.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_off000047c7.bin
932fb1aec990814678907a02f27ef5acd9a363f66e41f0e9120719ad858244b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x47C7 5408 bytes
font_01_sfnt_off00005a25.bin
200486086396cb07371293b43b0543e1601484385e753fc98dd8e5f0637420a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A25 10216 bytes