Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0d30ce04a50021…

MALICIOUS

PDF

33.7 KB Created: 2020-11-03 14:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 360251afc71f97828e0bd5d06eb01a58 SHA-1: 11bca5fdb360000a3534650735730caf063f12a4 SHA-256: ff0d30ce04a50021fe8fd45940754ccf3ffdb2c46fe0491bd415c4d1c56464d7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise the malicious intent. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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://ggtraff.ru/strik?keyword=me+and+the+key+3+level+23+solution
    • https://cdn-cms.f-static.net/uploads/4391909/normal_5f8e52b685cdc.pdf
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f8c00a52e011.pdf
    • https://cdn-cms.f-static.net/uploads/4420589/normal_5f964d7b8e271.pdf
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f8845a0e211a.pdf
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f874a480a3e7.pdf
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f99faa61e9bf.pdf
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5f90ad3b85c3f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/39bb9e76-659a-4013-b9c5-dcc1f7f427a1/10703885334.pdf
    • https://uploads.strikinglycdn.com/files/aa0ee91b-aaaf-4e02-af26-8ef14bb540fe/priyanka_gandhi_ki_age.pdf
    • https://cdn.shopify.com/s/files/1/0481/7669/3397/files/fexawanufigufawawi.pdf
    • https://s3.amazonaws.com/fosalizuzu/fort_indiantown_gap_cemetery_map.pdf
    • https://s3.amazonaws.com/tosevud/mario_benedetti_poesia.pdf
    • https://cdn.shopify.com/s/files/1/0508/1759/7623/files/uncharted_golden_abyss_trophy_guide.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_off000046e3.bin
813224169646584ce06737825d4a3c72df3fe7e125e451e9cb1ce003dd583c73
pdf-font-stream PDF embedded font (sfnt) at offset 0x46E3 5344 bytes
font_01_sfnt_off0000592b.bin
777fd23e1d88c1cffe8b45e8c88639d6a924a79a032aeab954d090ddb55a4157
pdf-font-stream PDF embedded font (sfnt) at offset 0x592B 9708 bytes