Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2d8fd5036f38c9…

MALICIOUS

PDF

42.5 KB Created: 2020-08-22 01:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d52d37367891ec0b430bb47cb5a59c34 SHA-1: 9b44e0bce3444ccab3e3e32326afcb2946a89c17 SHA-256: 9d2d8fd5036f38c94380d74a1704aed8d72b0ec8f593a48ad22af653698882a5
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the payload. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting a social engineering attempt to trick the user into clicking the link. The presence of numerous other links, many pointing to Shopify domains, indicates a link farm strategy to improve search engine ranking and visibility for malicious content.

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=formal+email+greetings+without+name
    • http://jizasok.jsjrnashville.org/uploads/1/3/0/7/130740141/1346642.pdf
    • http://files.campfellows.com/uploads/1/3/1/3/131380717/2851143.pdf
    • http://files.plyboat.com/uploads/1/3/0/7/130775503/mipozefejavoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2559/files/28045108420.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/brochure_templates_for_powerpoint.pdf
    • https://cdn.shopify.com/s/files/1/0436/5041/6793/files/jinejidokibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/barycentre_cours.pdf
    • https://cdn.shopify.com/s/files/1/0431/1144/8727/files/install_spark_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/6095/3249/files/46031165789.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/63237375046.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_off000068dc.bin
3d70c6bf2715a82d6812343e6c15b068552d0b27015af76a440d534cd2ae4550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DC 5148 bytes
font_01_sfnt_off00007a3d.bin
11934e38984ef275a8b3ea61dafc4282c02d9eb1ea0f7cb7631eddfc8ff4e3b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3D 10272 bytes

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