Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f56f8540d3eb6d…

MALICIOUS

PDF

63.5 KB Created: 2020-09-01 15:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8bc276ccc8455637bd3fc7502922cb2 SHA-1: 0661e23b5811c1a818ff3b55e68f54cb6462795a SHA-256: 85f56f8540d3eb6db4e1094d2e5a67f9afd6ca53bf90f29d98c1f308e758eb0f
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/wix?keyword=asme+b31.+10+pdf', which is likely used to redirect users to further malicious content. Another embedded URL, 'https://cdn.shopify.com/s/files/1/0435/8189/8913/files/62601185695.pdf', is also present, though flagged as benign. The document body contains garbled text but includes the target URL, suggesting a lure for users searching for specific PDF documents.

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/wix?keyword=asme+b31.+10+pdf
    • https://cdn.shopify.com/s/files/1/0435/8189/8913/files/62601185695.pdf
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/characteristics_of_successful_communication.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/31912579871.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/fisewekuranazimiwufaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/tekadoguwuvasatej.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7056/files/aadhar_card_application_form_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0463/9650/6267/files/euclidea_answers_1._7.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/mulubonenikoduj.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/wunolagenovizakozuko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/36992352101.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/39860490477.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/druid_flight_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7181/files/pakajedoxuvivulijegopure.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_off0000a8f9.bin
d2fe081cdee939c3ff4782124c7539b556c62d934b055209ebfad6951ec04650		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F9 4812 bytes
font_01_sfnt_off0000b949.bin
9d080b89b5bf9020d2bc79722b2057cb04a495a43b9a1f97bbc7844bb9f7fd99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB949 13360 bytes
font_02_sfnt_off0000e2d8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D8 4324 bytes

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