Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf43f9a67aa598f…

MALICIOUS

PDF

33.9 KB Created: 2020-08-22 15:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 122409e3e3f0f150d752a4b86e7ad729 SHA-1: 27013671e52556f544adffdca282fdcdba11b8ef SHA-256: abf43f9a67aa598f4150d49aada8cf874587b350d7fb7907e8d2dac3f13c5624
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to this malicious site. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the file type is PDF, indicating a likely social engineering lure to trick users into clicking the malicious link.

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.com/pify?keyword=law+abiding+citizen+movie++in+isaimini
    • http://noteb.dragomirdogs.com/uploads/1/3/1/4/131438157/nexunigurip.pdf
    • http://files.ajmasotti.com/uploads/1/3/1/4/131483492/feefb278db7a1.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3047/files/utorrent_apk_for_android_2._3._6.pdf
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/pugotefunefemanajofijesoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/wepakonulijiraxoriwad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/10099297152.pdf
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/woturidela.pdf
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/texas_parent_taught_drivers_ed_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/nuluxeso.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_off000042bd.bin
655263d6a938c06a7a28bd7a5df0334d91af48cb8e07adfa96c5357dbcdc14ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42BD 5416 bytes
font_01_sfnt_off00005538.bin
695e5355272a6efdeb2b67d3b0ecdeb6f92a381d8b66d5d7621f386eb1ddaa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5538 10620 bytes

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