Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0c1873df2ed13f…

MALICIOUS

PDF

46.7 KB Created: 2020-08-21 15:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a884c74b9e24b8a4f730cbb095ff63d SHA-1: a38e4041a599a0f76eba083c5db6c832422f87d2 SHA-256: 8e0c1873df2ed13f667264f9097374301f204d88002ed08db27bdf58bc355086
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to educational forms, aligning with the malicious redirector's keyword. The presence of numerous external links, including a link farm, indicates a strong intent to direct users to malicious infrastructure.

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=b.+ed+form+last+date+ignou+2018
    • http://baxek.piercenativeplantsale.com/uploads/1/3/0/7/130738799/nimenilufaxujuvi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0932/5730/files/pegejapub.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/66814896911.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1188956193.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/alexander_solzhenitsyn_books.pdf
    • https://cdn.shopify.com/s/files/1/0454/2916/2152/files/java_advanced_thread_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/general_cable_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0448/4605/5586/files/fronted_adverbs_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/chemdraw_free_pro_8._0.pdf
    • https://cdn.shopify.com/s/files/1/0440/1764/7766/files/37815879164.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_off000076e2.bin
47ccca738a110f2ed1db4b5ffe4abc4133c3d28253a73bb2a0fa6d24d5b2a727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E2 5828 bytes
font_01_sfnt_off00008aa5.bin
0e86a0de148b7d55cfee4e64b7620785bcc3568e81e039521533621dae1e647a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA5 10376 bytes

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