Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f3074f91193ca1…

MALICIOUS

PDF

57.5 KB Created: 2020-08-31 08:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7580562b5b5af7ea0d9e5ca7f4970c1e SHA-1: 5f8abf819829c72f672fd363e02b9ece71bfe277 SHA-256: 13f3074f91193ca17f78affd7786f1f8edccb02297032692e987b3ab0c1845f5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. Crucially, it also contains a lure to copy/paste content into a command-line interface, indicating an attempt to trick the user into executing commands. One of the embedded URLs, ttraff.com, is flagged as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/wix?keyword=the+swerve+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0457/8118/8764/files/autocad_2014_free_softonic.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/introduction_to_statistical_data_analysis_for_the_life_sciences.pdf
    • https://cdn.shopify.com/s/files/1/0460/0692/7527/files/kanuwazulaxej.pdf
    • https://static.usrfiles.com/ugd/b8c837_74a7e9162a694b34bc0a06287e79a99f.pdf
    • https://static.usrfiles.com/ugd/bb13a2_0185e7e7ac044438abc4d5c283ec69f4.pdf
    • https://static.usrfiles.com/ugd/c83fdb_ab6f6376155d48d28c646a7191fc9bf7.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/73961991885.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/tugujopo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0624/5539/files/ninojawabobuzubafugimo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/50434974669.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/confidential_litigant_information_sheet.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a542.bin
95fcd8ddf2c6ee25ff63ed664c1c1a7be5c72942b08a22f1bc8842a5a14f3480
pdf-font-stream PDF embedded font (sfnt) at offset 0xA542 4988 bytes
font_01_sfnt_off0000b650.bin
70ed723e071b0f5aec636ffd2e9ce792fa78c7a223e1472f4ce347c2ca8eac21
pdf-font-stream PDF embedded font (sfnt) at offset 0xB650 10388 bytes