Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1347b9e165999eb…

MALICIOUS

PDF

44.2 KB Created: 2020-09-01 00:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7160ac487d148a547e1003b14f513cdc SHA-1: ce9b57fb61727c4487cc106958b9800ab0d55f4d SHA-256: a1347b9e165999eb2d30d3cf1b29c24c032f0f8f5a1f4a344e45ad611998da11
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=afd+informatique+rennes'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, suggesting a lure to external content. The primary intent appears to be directing the user to a malicious site.

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.ru/wix?keyword=afd+informatique+rennes
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/74625200395.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/16817207237.pdf
    • https://cdn.shopify.com/s/files/1/0433/5543/9263/files/alimentacion_para_diabeticos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2845/4296/files/95697696777.pdf
    • https://cdn.shopify.com/s/files/1/0431/1878/8774/files/72969151373.pdf
    • https://cdn.shopify.com/s/files/1/0434/1239/0038/files/31096047695.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/89122237958.pdf
    • https://static.usrfiles.com/ugd/c345b0_88a3652a53c146c6b8f9b23edfa81e2e.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_26f368f3aaa946d482e788873089e1a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f825cf65625495496c79e78b526030c.pdf
    • https://static.usrfiles.com/ugd/b8c837_656e513a77274f1c97b5d609382164e4.pdf
    • https://cdn.shopify.com/s/files/1/0431/5316/2394/files/malemugumirasulibiluno.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/adverbs_of_time_place_and_manner_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/watercolor_portrait_techniques.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_off00006bcc.bin
df84ca90efa3336ca67856a2470f077200ac7d5dbbf1df43a563cc9d28f55edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCC 5136 bytes
font_01_sfnt_off00007d29.bin
46c6bee4f4fc7ea2c381e8a7956fa7098e7c440235801181a652dec62a9f582a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D29 11976 bytes

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