Malicious PDF — malware analysis report

Static analysis result for SHA-256 efeb71ec9f672595…

MALICIOUS

PDF

51.7 KB Created: 2020-11-03 11:05:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e048fd9cf1ac6596f3fbefc069b6ed5 SHA-1: 1b8c0eab53929da4a676868e78f8ca5910398c9d SHA-256: efeb71ec9f672595b69f122140da9940746508af5581c8ffb7eef2c41f2a6f5f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links, https://gettraff.ru/aws?keyword=innovative+ordinance+5.1, is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it's the intended destination. The presence of embedded JavaScript, though not directly analyzed for malicious intent in this report, is common in PDF-based attacks.

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=innovative+ordinance+5.1
    • https://cdn-cms.f-static.net/uploads/4411483/normal_5f9c0eb101c60.pdf
    • https://sukanogijero.weebly.com/uploads/1/3/4/3/134333185/sivugavobukigatiga.pdf
    • https://cdn-cms.f-static.net/uploads/4409248/normal_5f9f6090e3039.pdf
    • https://cdn-cms.f-static.net/uploads/4416660/normal_5f98d9f7ea85e.pdf
    • https://cdn-cms.f-static.net/uploads/4420476/normal_5f966309a8263.pdf
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f874ae21bc7b.pdf
    • https://cdn-cms.f-static.net/uploads/4387031/normal_5f96429d7fe9a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0501/5837/0991/files/ration_card_demo_form_up.pdf
    • https://s3.amazonaws.com/muxozuvalubi/college_board_ap_euro.pdf
    • https://cdn.shopify.com/s/files/1/0266/9500/8455/files/13786609590.pdf
    • https://s3.amazonaws.com/zirojopemup/20417754475.pdf
    • https://cdn.shopify.com/s/files/1/0481/8049/4485/files/2300304825.pdf
    • https://cdn.shopify.com/s/files/1/0484/5548/3546/files/macroeconomic_policy_and_financial_markets.pdf
    • https://cdn.shopify.com/s/files/1/0433/3636/8283/files/final_fantasy_sonic_x6_newgrounds.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_off00008d19.bin
8c42d7ba69c0b0a176c9512fedd400173e0e1ad084b4501d3c823425701a41d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D19 4928 bytes
font_01_sfnt_off00009dfe.bin
7e08345a3f5d0e033b0e96309429bda6d1279d6b97689344b0bc1e88997248e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DFE 10400 bytes