Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1d4055b218a74b…

MALICIOUS

PDF

63.5 KB Created: 2020-08-15 20:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38359a2748fe59bc5e76be0630a669b5 SHA-1: 4476f81182ef351f9e7a261f537eb90895bc1bb4 SHA-256: 2d1d4055b218a74b0409b5f9edea6a3f97f0f2a03f8b3fe2ad640e2a5559b084
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=umweltschutz%20wortschatz%20pdf'. The ML classifier also strongly indicated maliciousness. The document body itself is largely unreadable binary data, but the presence of the malicious URL and the link farm structure strongly suggests an attempt to lure users to a harmful destination.

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/wb?keyword=umweltschutz%20wortschatz%20pdf
    • http://files.ncc-tu.org/uploads/1/3/0/7/130776054/3799562.pdf
    • http://xifigosam.lakekitchawan.com/uploads/1/3/1/4/131453541/taxidejogezaz-sekexowelu-zudiguk.pdf
    • http://files.glossopoeist.com/uploads/1/3/2/3/132302871/tenonukeduze.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/barbarian_days_a_surfing_life_william_finnegan.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/88817850836.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/xedoroxogewob.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4041/files/63925455289.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4292/files/gezuvawexenewi.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/apple_s_mission_statement.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/edelbrock_1406_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8518/files/water_pollution_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/dublin_ireland_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/3338080583.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009981.bin
c617d413fb7f0aece7577336f82ef2f6068694b57f0d84ac7dadbfc120226e81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9981 4140 bytes
font_01_sfnt_off0000a866.bin
b3bf0047f973d85e38d713dd6ddf4f5750b17721c10a66f026cb170d82655cab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA866 5256 bytes
font_02_sfnt_off0000ba6b.bin
2ab15dab7bdc9752b696da8a5f91fcc37cf9c086d7b1bbabb33ca3650dccbd09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA6B 11940 bytes
font_03_sfnt_off0000e151.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE151 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.