Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffce8c04ea08192e…

MALICIOUS

PDF

41.9 KB Created: 2020-08-13 22:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9667dd95d0e03f54f6a1483a743f9b66 SHA-1: 238c0afd48269a01f1e826d66de48ca4b43549b3 SHA-256: ffce8c04ea08192e60668687aa184a62737787bc4fcdb3508893a14aff89f7a3
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=audacity++for+windows+xp'. This URL is presented as a download for 'Audacity for windows xp', indicating a social engineering lure. The document also contains a PDF link farm heuristic, with many links pointing to shopify.com, likely to improve search engine ranking for 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=audacity++for+windows+xp
    • http://files.detroittaprep.com/uploads/1/3/0/7/130775371/xokiro.pdf
    • http://mabov.davismilitarybooks.com/uploads/1/3/1/3/131398024/2355201.pdf
    • http://files.rhccfd.org/uploads/1/3/0/7/130775490/2873889.pdf
    • https://cdn.shopify.com/s/files/1/0435/7727/8623/files/25676272836.pdf
    • https://cdn.shopify.com/s/files/1/0437/8787/8549/files/butudekeperonevapadij.pdf
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/85668513615.pdf
    • https://cdn.shopify.com/s/files/1/0435/1475/7288/files/zalixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/buy_side_pitchbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/0531/3177/files/85399129286.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sakemiribukewud.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/fernando_pessoa_books.pdf
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/disagonedefobetebekeba.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/25491659846.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/wodawobosesamu.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_off00006392.bin
8b11df38b7548d7ce5c7380f5988b71f342ef8cb0989f4dc1855c7204c748a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6392 5368 bytes
font_01_sfnt_off00007600.bin
5c1fd96a38ab0e7aad1ac426439d555ee4f560a35e40c1be0a0a63b9f338602c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 11240 bytes

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