Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b02d850e4b9c604…

MALICIOUS

PDF

32.7 KB Created: 2020-08-01 17:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9bc64de4bc59c5f2c63449971398463 SHA-1: 718ff4bc2bedf712b413c8cd4da9cf8c167984a8 SHA-256: 3b02d850e4b9c604106f4428cb6409d35ae10619141f690f4c6ec94192e5167b
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, 'https://ttraff.com/pify?keyword=cycle+country+plow+parts+diagram', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=cycle+country+plow+parts+diagram
    • http://files.anxietyannarbor.com/uploads/1/3/0/7/130738799/jadivinaxivafu-savavapasofobet.pdf
    • http://files.portugalmatchworn.com/uploads/1/3/1/3/131380029/4215015.pdf
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.pdf
    • http://files.thebusinessetiquette.org/uploads/1/3/2/3/132302940/2923086.pdf
    • https://cdn.shopify.com/s/files/1/0434/1868/1496/files/71015419964.pdf
    • https://cdn.shopify.com/s/files/1/0435/9028/7517/files/fogogi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5836/2528/files/how_to_download_netflix_episodes_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/49260436826.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/56527356369.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/88758694851.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13503036424.pdf
    • https://cdn.shopify.com/s/files/1/0439/0925/1227/files/19152897564.pdf
    • https://cdn.shopify.com/s/files/1/0439/4788/4702/files/22326329718.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/fupilufoxataxof.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_off000042e0.bin
fa34d550b3b4494e2dda25e08aa763e6fde51f1e6a8bfd213bdc405552b192a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42E0 5492 bytes
font_01_sfnt_off0000558e.bin
b6148c7260693215a75bc4ad64905c56c0d5efea1c296e16dfff32dae3403ffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558E 9588 bytes

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