Malicious PDF — malware analysis report

Static analysis result for SHA-256 5422363f20298049…

MALICIOUS

PDF

53.2 KB Created: 2020-09-01 21:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00ce3539b360ad705b4f11eb35d02af2 SHA-1: 57de0f8614fbd7da88dea075632abcf2d3b9e29a SHA-256: 5422363f202980496a19da82a4910715d5f23460cccf97eb5165a8754ff8aa66
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. Additionally, it contains a link farm with numerous external PDF links, many hosted on static.usrfiles.com. The document body, though heavily obfuscated, contains the URL https://ttraff.link/pify?keyword=bleacher+report+power+rankings+soccer, which is the primary indicator of malicious intent.

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.link/pify?keyword=bleacher+report+power+rankings+soccer
    • https://static.usrfiles.com/ugd/48d9a1_4dc85fc3185c401894a7d89be516b524.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fc0f95631f744759b2ac730f477f9fc.pdf
    • https://static.usrfiles.com/ugd/0c41e7_f75548fdb5ee4b0cb5347a8cc7678785.pdf
    • https://cdn.shopify.com/s/files/1/0430/8153/1541/files/60338263841.pdf
    • https://cdn.shopify.com/s/files/1/0461/6463/9896/files/passive_voice_verb_tenses_chart.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/cantar_a_beleza_da_vida_cifra.pdf
    • https://static.usrfiles.com/ugd/b8c837_96b2e90230c841c2ac1b7b735ba3c03a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7554a1c1d336409b989e723bb9805fba.pdf
    • https://static.usrfiles.com/ugd/b8c837_a9dbb04f51b248458d402b03cdef864a.pdf
    • https://cdn.shopify.com/s/files/1/0464/6846/4792/files/carnegie_learning_geometry_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/somexuvugolafoje.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_off000092ca.bin
d8a9fb126f386dad0effcc5619552ffd6eb16a851d6a38a8ab78ad8d53986211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92CA 5400 bytes
font_01_sfnt_off0000a53d.bin
b31cf26a9bb6d807a6859171923120422c4137c12ebc3173ebad09f093c88d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA53D 10124 bytes

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