Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0bf450adf719d08…

MALICIOUS

PDF

39.9 KB Created: 2020-08-17 12:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ece01c0c3b93227533ee134d8d9e4da SHA-1: 3a0ac7729726d5df32d263006815110638342ee6 SHA-256: b0bf450adf719d08ad7a0daffafa546a389e097dedd9b6701e0587680ad71ca7
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=chernobyl+podcast+android', is flagged as a malicious redirector. The document body appears to be corrupted or obfuscated, but the presence of numerous links, including the malicious redirector, suggests an attempt to lure users to malicious sites or to manipulate search engine rankings.

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.cc/pify?keyword=chernobyl+podcast+android
    • http://jinevuw.luckyprowrestling.com/uploads/1/3/1/4/131437318/nawuzu_lenapawidaj_dinukuxif_didudavokukubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/23144967716.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/nudajedufaxujufozonenen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9822/7353/files/sibaji.pdf
    • https://cdn.shopify.com/s/files/1/0437/3980/7893/files/natusigur.pdf
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/71103207679.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/33226696837.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jeravutudab.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7763/files/finding_area_of_irregular_shapes_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/boxozup.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_off0000613a.bin
67ac4017d6ddbe55fadeb46b8d8dfae12a2d614717019ad8e2b7aade72fbce77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 5308 bytes
font_01_sfnt_off0000732c.bin
49c3445e447730dbf1edd0ab26a28a557cda8d78975c61612532ddfa22f4256b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732C 9464 bytes

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