Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd4ed9281f9568b…

MALICIOUS

PDF

39.0 KB Created: 2020-08-15 00:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ce73af741b78a358da1a13651cbb007 SHA-1: d939dde9b5d287a0bcaea898fbf3348babed3ee4 SHA-256: acd4ed9281f9568b78afd02adb3f9e7fe2b513e00df1490f2987a072f74d7241
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 a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'grade 2 math fraction worksheets pdf' and includes the malicious URL. This suggests a social engineering tactic to trick users into clicking the link, likely leading to further malware download or phishing. 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.ru/pify?keyword=grade+2+math+fraction+worksheets+pdf
    • http://fukabev.darkpoetry9.com/uploads/1/3/2/7/132741615/5773589.pdf
    • http://files.palomboaquatics.com/uploads/1/3/0/9/130969761/4887897.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/3528888773.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/4905241926.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/cambridge_igcse_mathematics_core_and_extended_revised_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/cbse_compartment_exam_online_form_2019.pdf
    • https://cdn.shopify.com/s/files/1/0437/5992/7448/files/25114019414.pdf
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/79647861121.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/93440194418.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/informatica_bdm_developer_tool_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/7211759287.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_off00005b48.bin
09546e7c433304adad7faca12321bd478adc86ac004cac3f2db2b2044a4c62c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B48 5684 bytes
font_01_sfnt_off00006e93.bin
6cc3dc049b2949900cc7e59af58a65684ca7c91611d8558585cc6b3edb722b93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 9616 bytes

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