Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b522676e352ce78…

MALICIOUS

PDF

32.6 KB Created: 2020-08-14 23:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8d238d31e44329a4175d9346c3053b4 SHA-1: a952fdd18645a4891446c7a5c7df392dd4897493 SHA-256: 3b522676e352ce78711e2275ccae00ae4f2fc179d9a14e07d7ec92b627c7b946
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for sheet music, which redirects to the malicious ttraff.cc domain. This suggests a phishing or redirection attack.

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.cc/pify?keyword=interstellar+main+theme+piano+sheet+patrik+pietschmann
    • http://gegejaj.clothdiaperproject.com/uploads/1/3/2/6/132696051/2085399.pdf
    • http://jagamus.a-mel.co.uk/uploads/1/3/0/8/130814328/e91bc3e0f.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3462/files/92925675075.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/mufodanedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/34746290751.pdf
    • https://cdn.shopify.com/s/files/1/0433/3997/2773/files/microsoft_excel_course.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/saxasoxipalulawifosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56802730071.pdf
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/6102941087.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2063/files/12737621776.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/sebuni.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/antidiabetic_activity_of_gymnema_sylvestre.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/75266933588.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_off00004260.bin
fa8fdd2e286c96a843197d7d392ddbe53adbecfa5d5f326f1d8e88c26b5febfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4260 5172 bytes
font_01_sfnt_off000053c1.bin
2b3e4a0ef09d51cb6178e350218dd62dbdfe1e8452d7586e3e3856ea9ba22107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C1 9812 bytes

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