Malicious PDF — malware analysis report

Static analysis result for SHA-256 3807e426a370d92f…

MALICIOUS

PDF

37.9 KB Created: 2020-08-06 23:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c26a36ccc54aeb088593ff431c9b1de SHA-1: 14fae5de3e0fe6efbb21fb13b9368d3175a03d29 SHA-256: 3807e426a370d92f307be59961e092d5516afd20f93de357595c9d5ca4df2e31
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://ttraff.com/pify?keyword=hallelujah+sheet+music+pdf+piano. The document body also contains this URL, suggesting a social engineering lure to download further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=hallelujah+sheet+music+pdf+piano
    • http://files.alinasab.ca/uploads/1/3/2/6/132696015/4473001.pdf
    • http://files.holytemplec.org/uploads/1/3/1/4/131453598/zaxopoxudito_mogogodabuga.pdf
    • http://files.conservexenergy.com/uploads/1/3/1/4/131406717/gelireza.pdf
    • http://files.declutteringspaces.com/uploads/1/3/0/7/130776218/duxupugixa_mewan_zesasuk_vikizama.pdf
    • http://files.ct-asta.org/uploads/1/3/1/3/131384797/1e73b7a6dd06a.pdf
    • https://cdn.shopify.com/s/files/1/0428/6539/3831/files/45973712255.pdf
    • https://cdn.shopify.com/s/files/1/0439/8202/8958/files/namexasogujovarenidifivas.pdf
    • https://cdn.shopify.com/s/files/1/0437/2407/9254/files/xray_resource_pack_1._12._2.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/jiliwesewewuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8864/files/look_back_in_anger_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/45259736683.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/pifedorux.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/buddhist_temple_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/82153109559.pdf
    • https://cdn.shopify.com/s/files/1/0435/3009/2712/files/biblical_theology_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/36332005023.pdf
    • https://cdn.shopify.com/s/files/1/0428/6388/6495/files/rolixuterekefise.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9203/files/mulevalijekedisitufusepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/girugununezexaligifo.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_off000055d9.bin
24cc39e58a963e1139f0b4d47bdb06e372deceaec93ca6218b57697954904cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D9 5336 bytes
font_01_sfnt_off000067e1.bin
bd1baa8788612acbbe1042bd80a0f4b413c2fc7aad6c8ee3ad4220ed157c03b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E1 10060 bytes

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