Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e3daaf1605d8da…

MALICIOUS

PDF

42.9 KB Created: 2020-08-16 19:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bde42a9f7f9702380d8a37d9696e86b5 SHA-1: e100fd3aa72fe8c431463ab02d9dd107a60079ee SHA-256: d8e3daaf1605d8da8e2dcde6061c36984c17956ddab33a3f302e52c5ff737f63
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a download for 'Cheat engine android new version'. This is further supported by the PDF_SEO_LINK_FARM heuristic, indicating a large number of outbound links, likely for SEO manipulation or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body contains the malicious URL and a benign-looking PDF link, likely as part of a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=cheat+engine+android+new+version
    • http://files.lathamhomesanitation.com/uploads/1/3/0/7/130739303/6574550.pdf
    • http://lijemitid.nmdnyi.com/uploads/1/3/1/3/131398560/nujibotika.pdf
    • http://files.konspiracycosplay.com/uploads/1/3/1/3/131398366/181d20e0f347.pdf
    • http://files.academyofequestrianarts.com/uploads/1/3/1/3/131380627/b801cb610221da3.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0999/files/12949394763.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3851/files/56332590567.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/missing_angle_of_a_triangle_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/sataxobosewutobepoje.pdf
    • https://cdn.shopify.com/s/files/1/0454/4312/1302/files/jspdf_autotable_column_styles.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/nixopazetebuled.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/rikijituwipebesizog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xazome.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/91997574150.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/core_java_tutorial_with_examples_pdf.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_off00006a5f.bin
794a3a299b8559cd658c4339e768099fff7cf81de6244192dd11c445c69c5810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5F 5112 bytes
font_01_sfnt_off00007bce.bin
bc8d2a727e03358c754dcd350991d6b4ddd718abe460721ab805b422db833baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCE 10340 bytes

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