Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5d592f8eb5bea5…

MALICIOUS

PDF

46.4 KB Created: 2020-08-12 05:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b28826a90b74cb91b49fc53d29174ead SHA-1: 466ebe75051a94c68133850ea9fdf09e2b9fd6e3 SHA-256: eb5d592f8eb5bea5336b910f90d4990841b753700415bf0d867ecf78c430ff7c
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wb?keyword=naglieri%20nonverbal%20ability%20test%20pdf', which is identified as a malicious redirector. This suggests the document's purpose is to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/wb?keyword=naglieri%20nonverbal%20ability%20test%20pdf
    • http://files.easttexastshirts.com/uploads/1/3/1/0/131071253/5765665.pdf
    • http://bifap.nnmcstudygroup.org/uploads/1/3/1/1/131164079/e963ec.pdf
    • http://files.musemodelsdarwin.com/uploads/1/3/0/7/130739328/9543614.pdf
    • http://files.brickyardphoto.com/uploads/1/3/0/7/130776712/411830.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/39301416066.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/73837884337.pdf
    • https://cdn.shopify.com/s/files/1/0431/7518/2496/files/essay_about_air_pollution_cause_and_effect.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/rotebenofot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/razosupabuwomorigi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9482/5376/files/94680360072.pdf
    • https://cdn.shopify.com/s/files/1/0432/7125/8278/files/36974206381.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5465/files/bnf_70_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5533/4055/files/node_js_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/calendario_septiembre_2020_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/39750433084.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/inkscape_to.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/assessment_tools_in_social_work.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/computer_science_book_for_class_12_pakistan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b4.bin
25066f75313a8b5ffbf17b869feea5574f9da7caa92b36e21f863d0a540840d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 5268 bytes
font_01_sfnt_off00007ab1.bin
705015e42290c9a32f62cf8974cfdfc13ca1f439de8f492aa2dd3de64c7bedca
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB1 10352 bytes
font_02_sfnt_off00009e1f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E1F 4324 bytes