Malicious PDF — malware analysis report

Static analysis result for SHA-256 a789a46932e4109e…

MALICIOUS

PDF

56.7 KB Created: 2020-08-02 23:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd0bf5d3dcbede86f9f73385de3db346 SHA-1: 54049b59730b3dc31b30dff9a8c531583bc6f0dd SHA-256: a789a46932e4109efa692fd8080978185e9f125abdd9ff93d661ca4e90e25242
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains the URL that is also present in the heuristics. This suggests the primary goal is to trick the user into visiting the malicious URL, likely for credential harvesting or further malware delivery.

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=turning+tables+sheet+music+pdf
    • http://files.simplypleasuresphotography.com/uploads/1/3/1/3/131383247/3598477.pdf
    • http://files.bottineaubaseball.com/uploads/1/3/1/4/131452938/ronelexobefule.pdf
    • http://files.proletariantraininggroup.com/uploads/1/3/1/4/131409090/2849660.pdf
    • http://files.halltosuccess.com/uploads/1/3/1/3/131384359/zeruwakalubelekik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/32676746845.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/xogevizobivuvenasipi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/63890602632.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7062/files/zozovipexivamalokesixop.pdf
    • https://cdn.shopify.com/s/files/1/0438/5082/5893/files/jab_comix_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/81480094277.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/7014081379.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/11827661523.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/81289655613.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/applied_electromagnetics_wentworth.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/4699599230.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/redibe.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_off00008a3c.bin
56e633e3a74027237ed4926a97a1c931bc88f9cd16e0ca2ba451c44dcb465ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3C 5660 bytes
font_01_sfnt_off00009d4c.bin
859b2a55851afe8ca9678ebfd115cd0b348469c27b1c833af569f295c83d322b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4C 10148 bytes
font_02_sfnt_off0000c040.bin
b330339415d7fa9c1b652c1fb2a052ec06569061b7b71506ab53161dc9b94742		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC040 16100 bytes

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