Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6452f88ba72b133…

MALICIOUS

PDF

37.7 KB Created: 2020-08-31 11:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09619bdbb763503a5f5620e64adeb58b SHA-1: ad50574a3abe1e795cd7e34e32209b0c2468b256 SHA-256: c6452f88ba72b13368735637b045437625b48486bae4c1d625986446fc94d35c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=dungeons+and+dragons+livro+do+jogado'. The document body, though heavily obfuscated, also contains this URL, suggesting the PDF's primary purpose is to redirect users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.com/wix?keyword=dungeons+and+dragons+livro+do+jogado
    • https://static.usrfiles.com/ugd/b8c837_30e52e76c26a4a27a458c873ae60bbbf.pdf
    • https://static.usrfiles.com/ugd/3cb679_4bd4e70e29a74e61a242074691c67be3.pdf
    • https://static.usrfiles.com/ugd/74c34a_dc84d9f73c31414ca837b60ad115ab44.pdf
    • https://static.usrfiles.com/ugd/e5a943_325dfa87c466488d9a9ea49dd0934075.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/inlet_guide_vane.pdf
    • https://cdn.shopify.com/s/files/1/0453/4665/2315/files/40133243673.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/95678531527.pdf
    • https://cdn.shopify.com/s/files/1/0463/5443/2161/files/7199264206.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3029/files/car_parking_games_for_girls.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/81875070069.pdf
    • https://cdn.shopify.com/s/files/1/0429/5055/7855/files/devadobulosojezu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/32192908312.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/baravu.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_off000047c1.bin
9d3b59a0ce3ae3f2f101ad473e2995d95ad98d6cd271eb80bfafe4265a485778
pdf-font-stream PDF embedded font (sfnt) at offset 0x47C1 4932 bytes
font_01_sfnt_off00005898.bin
69e3c2e0c641dd3e4605b99f4af558cc5041e50a880de4dacc1c8f757e2c8649
pdf-font-stream PDF embedded font (sfnt) at offset 0x5898 10936 bytes
font_02_sfnt_off00007c28.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C28 4324 bytes