Malicious PDF — malware analysis report

Static analysis result for SHA-256 9855a330bb1fc11d…

MALICIOUS

PDF

34.2 KB Created: 2020-09-18 14:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52b1a079dfa9e6a6498ee4c806b2b35d SHA-1: 2f2c3abc7c26ae07bf9c2a5ef59c9b1436972b7d SHA-256: 9855a330bb1fc11d80fb170d4e86ef71d35c83272a8f01aad83ceadf32762cf2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to benign content on Shopify. However, one critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting an attempt to lure the user to malicious infrastructure. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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.link/wix?keyword=la+que+se+avecina+mi+tele+temporada+10
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/aankh_mare_video_tinyjuke.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/ballade_pour_adeline_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/66694993817.pdf
    • https://cdn.shopify.com/s/files/1/0483/4695/5929/files/rokexoroxoza.pdf
    • https://cdn.shopify.com/s/files/1/0482/3800/2330/files/tixetuwema.pdf
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/katolight_generator_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/95366666744.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7639/files/wekevijebovelori.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/kerufipoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/99007016950.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/wabinibegigizikogabesudoj.pdf
    • https://ec7acb50-513e-469e-9612-580f571e3890.filesusr.com/ugd/197ed4_bace73cbd5ec4b40be999e7aade5c94d.pdf?index=true
    • https://3f1f2bd0-0ec6-40dd-a916-ff8b03ead8b7.filesusr.com/ugd/2994dd_6223cdbf61284ff595739464950624b3.pdf?index=true
    • https://d527647e-a9bd-4a4a-884a-ce0654bdde51.filesusr.com/ugd/a6e5e9_ff1b8edc8923403da45ebcbed0618bfe.pdf?index=true
    • https://218300b4-4024-4f97-baf0-841be486f817.filesusr.com/ugd/8cbfce_edccdda5ba494db7bdda5cdaabde47b9.pdf?index=true
    • 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_off0000472a.bin
5ee057036eb983d138b34822f08e04ceb36c5859269f5d0c6f6da5b641c5baa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x472A 5540 bytes
font_01_sfnt_off000059f3.bin
491b4cc2a3faea901c1d96c34653607448cedf2d373859a75050abe575598ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F3 10244 bytes

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