Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6ba9c98272de9b…

MALICIOUS

PDF

50.9 KB Created: 2020-08-20 18:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69f2d00bc76fd9f831f2ad7df74c5a69 SHA-1: 8e5f9f24bc550386310db003826b852ed1c7cdb7 SHA-256: 3c6ba9c98272de9b884bc2c5c03f87258f02c625e6188561f52899d31cc67c5e
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'simplifying algebraic fractions worksheet pdf' and the malicious URL. This suggests a social engineering attack where users are tricked into clicking a link under the guise of accessing educational material, leading them to 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.ru/pify?keyword=simplifying+algebraic+fractions+worksheet+pdf
    • http://files.amykaissar.com/uploads/1/3/0/7/130739099/giwuwokevaju.pdf
    • http://files.rosannadiggs.com/uploads/1/3/1/4/131437380/jugobegivogoreruxemi.pdf
    • http://files.flequipment-neelyville.com/uploads/1/3/0/8/130813511/440ccec1a72.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/bemis.pdf
    • https://cdn.shopify.com/s/files/1/0443/8884/3686/files/data_analytics_basics.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/95423313765.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/bharat_2020_year_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/disha_publication_child_development_and_pedagogy.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/calligraphy_basic_strokes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/xejizagamanezufapubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/exemple_cahier_des_charges_site_web.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/50747005909.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3295/files/xokukodulivolozig.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/daxunajuwikajuxamud.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/duduke.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_off00007f00.bin
51d40b80e025b37388c0f0123d6550a2adcdf251048dda4daa3b921bc9d9a5cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F00 6068 bytes
font_01_sfnt_off00009382.bin
70eb4ca81715461fb6917a4970a8840150b8819b1f4e9e0a1a8fa9ccadf9dbd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9382 13876 bytes

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