Malicious PDF — malware analysis report

Static analysis result for SHA-256 048c7903d33ea321…

MALICIOUS

PDF

85.7 KB Created: 2021-01-12 10:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5bb91fe271cbafb3970f3aeeca52231 SHA-1: d0f3ca38f225ca2ed93494114ff788c8a3031259 SHA-256: 048c7903d33ea3214bef0ff3abd159da958ab359d4e53f3ba9aa985acdd35b36
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various platforms. One prominent link directs to 'ggtraff.ru', identified as malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Nikon coolpix p600 manual focus', suggesting a lure to attract users to click on the malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ggtraff.ru/123?utm_term=nikon+coolpix+p600+manual+focus
    • https://site-1173584.mozfiles.com/files/1173584/arctic_animals_coloring_pages.pdf
    • https://cdn.sqhk.co/didatife/ifslIyn/95121311281.pdf
    • https://site-1168030.mozfiles.com/files/1168030/rupelukelejos.pdf
    • https://lufojegixibebaz.weebly.com/uploads/1/3/1/4/131407324/3854124.pdf
    • https://cdn.sqhk.co/jadepibake/jRidIjj/indie_adventure_games_android.pdf
    • https://bipilebel.weebly.com/uploads/1/3/1/6/131606150/domurakepoj.pdf
    • https://cdn.sqhk.co/xawodoze/ibvUu4Q/noxobixoravakabewikazenon.pdf
    • https://sopidafepu.weebly.com/uploads/1/3/4/7/134744384/lunegomot.pdf
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5faa8a014e867.pdf
    • https://kawuwulaf.weebly.com/uploads/1/3/3/9/133987507/c749e55fb7.pdf
    • https://cdn.sqhk.co/rarirawibowo/ojgzYm2/56918634546.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000e34d.bin
af6b9874e6fa514cf6857fa00a9c222e12692e0e63f50254e841db55e28d98cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 14844 bytes
font_01_sfnt_off00011060.bin
759cf9df7a346777e1a63df0bcf3b672de25462ce26a2a9438e4a7d543603f95
pdf-font-stream PDF embedded font (sfnt) at offset 0x11060 5460 bytes
font_02_sfnt_off000122f4.bin
f7f46ebb54108595982486df1dfc1191541e2a8e38791564ad4655bef80b9dc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122F4 11460 bytes