Malicious PDF — malware analysis report

Static analysis result for SHA-256 9355581e8942a0cc…

MALICIOUS

PDF

46.7 KB Created: 2020-08-19 21:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e800571b5797cc85aa599e6fe5b0348 SHA-1: fb5ad87c67700f84a6ee32f40aa43737bf84c6f5 SHA-256: 9355581e8942a0cc9bbb3bd28275bc04d459460890ddabaff632e7373e3f6d93
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=sorting+by+color+worksheets+for+kindergarten'. This indicates an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of a PDF link farm heuristic further suggests a coordinated effort to distribute malicious content.

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.com/pify?keyword=sorting+by+color+worksheets+for+kindergarten
    • http://files.matthewkalliman.com/uploads/1/3/1/3/131398541/0eab4b8.pdf
    • http://files.clast2019.com/uploads/1/3/1/8/131856374/1734592.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/biludesadapanefurena.pdf
    • https://cdn.shopify.com/s/files/1/0440/1099/5862/files/50903673269.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/74471908284.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/periodontal_disease_and_smoking_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/98643697247.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/bifariz.pdf
    • https://cdn.shopify.com/s/files/1/0450/5151/0936/files/6_inch_alphabet_template_printable.pdf
    • https://cdn.shopify.com/s/files/1/0440/5788/6870/files/71131846316.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/23845946541.pdf
    • https://cdn.shopify.com/s/files/1/0439/1128/2843/files/70531703136.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_off000076e8.bin
a3edb11e5f89a8bada5dfcdf043dc5886f4899803fad551202f87863c50ad0f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E8 5784 bytes
font_01_sfnt_off00008aa0.bin
ea7174d7fae4d895afb00412c7d6c1c8aaa9b868993cadd10223e39e851b058c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA0 10352 bytes

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