Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48127ab9fb11548…

MALICIOUS

PDF

56.7 KB Created: 2020-10-30 06:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62b2730b4bf1825921d0654d3dc68e7b SHA-1: dbadb6151c03d8b9be6b06e9d3f50299b0257b69 SHA-256: b48127ab9fb11548ca8e2ee24434ead985df28a6a04cc58a4fec61908a2921c1
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/aws?keyword=millennium+falcon+model+lighting+kit', which is flagged as malicious. This suggests the PDF is part of a link farm designed to redirect users to malicious sites, likely for phishing or malware distribution.

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://gettraff.ru/aws?keyword=millennium+falcon+model+lighting+kit
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f86f93e0ff3e.pdf
    • https://cdn-cms.f-static.net/uploads/4414166/normal_5f9442a289105.pdf
    • https://cdn-cms.f-static.net/uploads/4404976/normal_5f97215d6362e.pdf
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f9b21484caea.pdf
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f87fea3d8bf7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/9ed328c6-f88a-4058-8f1b-de3734d77458/bakery_technology_books_free.pdf
    • https://uploads.strikinglycdn.com/files/1d6ce13f-177e-4d0d-b920-10a6584ba867/luwurak.pdf
    • https://cdn.shopify.com/s/files/1/0499/7952/3240/files/kabafabuxuwarixefasomiw.pdf
    • https://cdn.shopify.com/s/files/1/0495/9980/7651/files/sororetegafo.pdf
    • https://cdn.shopify.com/s/files/1/0481/3393/1171/files/49694888176.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/north_park_elementary_guymon_ok.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_off0000924b.bin
95795f789ddf5b7bf3956ebc933f4df86566db7f6836e1e89afaac2bafb7606c
pdf-font-stream PDF embedded font (sfnt) at offset 0x924B 5112 bytes
font_01_sfnt_off0000a38a.bin
1e4959b1f34910f0c8dcfd8cc40f7453973142cd8bc164bb4ee6966eb47eda6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA38A 10524 bytes
font_02_sfnt_off0000c782.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC782 4324 bytes