Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c7caca2d806077…

MALICIOUS

PDF

39.5 KB Created: 2020-09-17 13:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec7d39e4fac7cda693e975d1ba574145 SHA-1: 65e7cfdf227273086ba9b5eb6d4512af54888d51 SHA-256: b5c7caca2d806077585da12939a227d492f886d19495bf4d71e887ee4224dd75
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The ML classifier also flagged this PDF as malicious. No scripts were extracted, limiting the analysis of the payload.

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.
  • 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.club/wix?keyword=price+rises+and+demand+is+unitary+elastic
    • https://557ac102-3203-40f6-b121-5473d1011151.filesusr.com/ugd/cf9ff1_a68c868746d74ef1a4e403e09ed1441b.pdf?index=true
    • https://080c02c7-1560-421b-ac69-dd2fc71e6ee8.filesusr.com/ugd/9ff9b8_6ed6d2127d534b9ba4d9667783eacee7.pdf?index=true
    • https://2aabcaf2-593b-41b3-b7cb-83d310f13e45.filesusr.com/ugd/8a4248_596920bfdccb44b3b589ce98a01ec961.pdf?index=true
    • https://d6c363f5-ffd9-47e5-b07e-c424103090e5.filesusr.com/ugd/ea2f88_3c005098b8114d35abc767373b68c260.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0486/5294/3510/files/which_of_the_following_is_an_example_of_observational_learning_learning_to_speak_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/forum_saradas_fiction.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/54850110247.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/wunigujima.pdf
    • https://cdn.shopify.com/s/files/1/0435/3091/1899/files/17940558583.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_off00005b54.bin
01449fa595e3e3c1c84a4f80293702071899fca886789d5c8a879d768d2ebc94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B54 5188 bytes
font_01_sfnt_off00006ceb.bin
2c801415f7c200e96e527fe682742fb1d424ebf2d7543d1de8eaa8491aaafc1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEB 10752 bytes

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