Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a726582f9cb3c2…

MALICIOUS

PDF

49.1 KB Created: 2020-08-31 18:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14a1b8c78a9aa97d052aaa4aebe56079 SHA-1: a28adccb2b97f9fc4ed8717d29439f1d4f723dd0 SHA-256: c2a726582f9cb3c22dfe3e3b1a03c76c0feadf48301fd93370d31723bbdac0ea
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a reference to 'imdb green inferno parents guide', suggesting a lure. The PDF also hosts a large number of external links, many pointing to Shopify domains, indicating a link farm or redirection infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=imdb+green+inferno+parents+guide
    • https://static.usrfiles.com/ugd/d162e3_32674fa518e3424494d1f04adea2755d.pdf
    • https://static.usrfiles.com/ugd/3615fb_6d8167e423fe4f2c85516868e5ec6b17.pdf
    • https://static.usrfiles.com/ugd/b8c837_37dda59325b84745b1f6d33c61e9f468.pdf
    • https://static.usrfiles.com/ugd/05900a_e8abbab5304940c9b6b77522cdd3d1f9.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_e1a85e6068d8412f9fbc11df6986a727.pdf
    • https://static.usrfiles.com/ugd/b8c837_835c1276d6614d6c9616b40e197738c1.pdf
    • https://static.usrfiles.com/ugd/760101_c991a1c88abe4495a17c132e69f001f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec2e43c4dbf241008a686e33d2b096df.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/fedojodugodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/cancionero_catolico.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/juvenelepoxazidodunaluv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4582/files/separately_excited_dc_motor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/nolewifogose.pdf
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/ontological_argument_for_the_existence_of_god.pdf
    • https://cdn.shopify.com/s/files/1/0439/6616/9246/files/performance_appraisal_feedback_survey_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/8063/7861/files/architectural_design.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/wijilesulufifegi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081a0.bin
43c55faf5c63a67d4ab3cafb2c84860f63e0a2a8132d5f2b1341513bb4389fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A0 5404 bytes
font_01_sfnt_off000093e9.bin
e22c9916f4cb1daf08988255e4c0d092d1a256b2a1130d2e543d3bcd828c9a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E9 10404 bytes

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