Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c05e93adf5e45d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-05 21:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba2db59dc0ead0edf89f2fc969a40338 SHA-1: 06ab6a692387c69b3cd6b7521eaf45c39c07de6a SHA-256: 41c05e93adf5e45df42aa3d0fef8b863bc2f1c56c91fb764dfe1b83dd9fbe269
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though partially corrupted, contains the text 'Merge jpg into a pdf' and the redirector URL, suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=merge%20jpg%20into%20a%20pdf
    • http://files.tancarrphoto.net/uploads/1/3/1/0/131070001/1227298.pdf
    • http://files.qthpublishing.com/uploads/1/3/1/6/131607321/saraxa-kulatuwo-womezu-nigixemolurixo.pdf
    • http://files.drylanddevelop.org/uploads/1/3/1/4/131453623/1306c.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/fabivanuludilidilanodip.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/wigewojegekefomuxas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2323/files/66503274574.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/bipividujit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78491346320.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/xatoroxeniv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/sodevimag.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/wetekarununogebuwapajet.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/89574019093.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/sumikitigosefa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3381/1351/files/63167563581.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.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_off00006149.bin
540463e8d86d937f6ad0eca4ba785f64c34c706ff05d9b7b880d2fb0d286704c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 5080 bytes
font_01_sfnt_off000072b7.bin
b9130182d6eae5b0ebe49c96e90587b9d90590e6711e3fd73278efc0a10b831b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B7 10100 bytes

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