Malicious PDF — malware analysis report

Static analysis result for SHA-256 440b556bb8b44ee1…

MALICIOUS

PDF

40.2 KB Created: 2020-08-03 03:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd0a47579f67d091ef9e3417b5d11661 SHA-1: 9a0839eeb6631d08f9c38687c68676078eb8beaa SHA-256: 440b556bb8b44ee16b22a730d53ba50827fcec4db7b825b112d9b2b4ee064504
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 a PDF link farm heuristic, indicating a large number of outbound links, with 'cdn.shopify.com' being a dominant host. The ML classifier strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.com/pify?keyword=for+better+or+for+worse+2014' is the primary indicator of malicious intent, likely serving as a lure or part of a phishing campaign.

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=for+better+or+for+worse+2014
    • http://files.coworkmendocino.com/uploads/1/3/0/9/130969993/5fe0d3cddac345.pdf
    • http://files.bingbazi.com/uploads/1/3/0/8/130813736/8256554.pdf
    • http://xovoxe.gmcvsuites.com/uploads/1/3/1/4/131407535/zuvufititizagag-bezuneki.pdf
    • http://jofunepik.glassfloatproject.com/uploads/1/3/1/8/131856917/657918.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/69965530460.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3650/files/zorulokavoduvuwopufumiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/sumunukule.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/87711757314.pdf
    • https://cdn.shopify.com/s/files/1/0439/3621/9291/files/50631051974.pdf
    • https://cdn.shopify.com/s/files/1/0433/4456/0281/files/7741163104.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/wakusopimitigetifisofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/nukega.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/34563995207.pdf
    • https://cdn.shopify.com/s/files/1/0430/7432/2586/files/kuxigamamodiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopafomapezujiwowab.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/9618026844.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/31624776253.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_off000053a4.bin
4323d33bf07b7cdf9e43a39cc8531ed92993005dd20abec3796132f6d58bb0ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A4 4752 bytes
font_01_sfnt_off000063f9.bin
7743f02430c07c619e9094ccb13e18028608260db4aa54fa238d06df3fa8380f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9 9840 bytes
font_02_sfnt_off0000858e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858E 4324 bytes

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