Malicious PDF — malware analysis report

Static analysis result for SHA-256 55096df79f849b0a…

MALICIOUS

PDF

42.9 KB Created: 2020-08-01 03:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f88e11c0d7101f4691f7c432a8f76e58 SHA-1: 89c90f9cc6a327aabbcb8fa2f6698ed582269929 SHA-256: 55096df79f849b0ad8eb7c1e1efdb2d92069516d2d19302c0c3eacf836af27e7
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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external PDF files, many hosted on Shopify domains. The document body contains the same malicious URL, reinforcing the lure. The ML classifier also strongly indicated maliciousness.

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=recent+bookmarks+register+log+in+recent+tags
    • http://files.watchyourhead.ca/uploads/1/3/1/3/131398036/5720387.pdf
    • http://files.britishrecordshoparchive.org/uploads/1/3/1/4/131482884/xejaludalawi.pdf
    • http://files.claireannagarand.com/uploads/1/3/1/3/131381518/1183138.pdf
    • http://files.mrsbockiusclass.com/uploads/1/3/0/7/130739119/limixuge-kuvipujixube-takiwided-kadafisuwipon.pdf
    • http://files.jannamparker.com/uploads/1/3/0/7/130739744/parisuravepiliseka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/xelajewunapuzunidigo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4563/2665/files/gujogogetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3415/files/jeguvefi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/rutodukuzopefugazemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/fodogadimin.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/96636662410.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/sujofebugiligixiletabuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4705/9607/files/82250532629.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/xasofujesilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/46623385.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/69159798760.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_off00005e11.bin
08933d2970a1a6bd2b0e703c10a4e2838bcf648d63b4c82d43eeb737c5df3934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 5328 bytes
font_01_sfnt_off00007013.bin
246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7013 1936 bytes
font_02_sfnt_off00007954.bin
e226fbb84fdc6437b85faf8e6e77449213ed95e28887a962e7f72fa643473f8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7954 11328 bytes

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