Malicious PDF — malware analysis report

Static analysis result for SHA-256 005d4d244fb049af…

MALICIOUS

PDF

39.9 KB Created: 2020-08-06 23:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9259e894a574d788186c53fb60332e2d SHA-1: fc5d2074b6e1d5d3e419832a35106643508d88bc SHA-256: 005d4d244fb049aff289796e6d0b1eec05291fe2a9207ea7fa19adb5435ac7db
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to a high ML classifier score and the presence of numerous embedded links. A critical heuristic identified a malicious redirector link pointing to 'ttraff.com', suggesting an attempt to obscure the final malicious destination. The document also contains a PDF link farm, indicating a potential SEO poisoning or traffic generation scheme.

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/pify?keyword=aocs+cd+8+53+pdf
    • http://zetegoj.thecitycabaretokc.com/uploads/1/3/2/3/132302780/3023789.pdf
    • http://files.jeffcomorotary.org/uploads/1/3/1/4/131483336/6958182.pdf
    • http://files.villagestogetherhub.co.uk/uploads/1/3/1/3/131384635/tobuwomozituze.pdf
    • http://samuveti.noramacquarrie.com/uploads/1/3/0/8/130874422/dobax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/nalivepal.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/melodies_of_praise_assemblies_of_god.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5716/files/antenatal_diet_health_education.pdf
    • https://cdn.shopify.com/s/files/1/0430/1363/6259/files/metabolismo_de_lipidos_en_monogastricos.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/63960524232.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/86359129873.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/7176735067.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/94847337455.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/90804501936.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/python_uart_example.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0605/files/59739290287.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5777/files/nidifiwanedezipipav.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/57272638160.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fc2.bin
85d333c4cf72d0ccf68757d23d2b88d8c01448b0a5b9df7cfd1c70130155161a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC2 4720 bytes
font_01_sfnt_off00005fc7.bin
6d054189c696f8be1452a209b246205d06ab817a44ca15c678f8945b6abda8f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC7 11280 bytes
font_02_sfnt_off000084c2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C2 4324 bytes

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