Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba01fb115aef582…

MALICIOUS

PDF

48.8 KB Created: 2020-08-04 02:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6fab3f2577e7e9949a0bca6686d9a28 SHA-1: bf1a4b4f8827eb8f7471c8145d12646dcd444cbe SHA-256: 7ba01fb115aef582f6d017325c9393121ae263e4cef03bcd2ef8121f00a6689d
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to click the malicious link, which is likely part of a phishing or malware distribution 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=arrays+and+strings+in+c+pdf
    • http://files.cecilialanders.ca/uploads/1/3/0/8/130814229/9453845.pdf
    • http://files.beechwoodnaturopathy.com/uploads/1/3/1/8/131856331/golilawut.pdf
    • http://vigazev.nrichardson.com/uploads/1/3/0/7/130775734/5e84bea9f090f.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/tarefupedurivamow.pdf
    • https://cdn.shopify.com/s/files/1/0439/9353/0526/files/kenwood_ts-_120s.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/74690740261.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/nomoliduwizuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/nazoxujatovumigi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/patuxuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/guxojotupokosafubexufesib.pdf
    • https://cdn.shopify.com/s/files/1/0438/3558/8770/files/78407151913.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/nejijib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/51182518283.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/jedonalopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/lugivixinaxaweputubazaka.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_off00006d7d.bin
6ef03595f4b69ca443068c6e989d5124068de4d3b5fbecde17ec1c1996da6387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7D 4940 bytes
font_01_sfnt_off00007e53.bin
0d95ba43e44cb6cba9b51ffca259f5699c4e82fa962057a00f0d878fdcdc5a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E53 12932 bytes
font_02_sfnt_off0000a84b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA84B 4324 bytes

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