Malicious PDF — malware analysis report

Static analysis result for SHA-256 f471ee5707b7b789…

MALICIOUS

PDF

36.5 KB Created: 2020-08-09 16:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6618f3f252d748a72cc8a186c874268 SHA-1: 21fe3f3fefbe879f9843d3cfb548918e35d7f596 SHA-256: f471ee5707b7b7893f57c973b43cd8f2d9d6150c9e8272f85ac28b8b03884007
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs. One of the primary links redirects to a malicious URL, ttraff.cc, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to 'Pathology atlas robbins pdf', suggesting a lure to trick users into clicking the malicious links.

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=pathology+atlas+robbins+pdf
    • http://files.lincolnbrady.com/uploads/1/3/1/4/131482832/bavejunu.pdf
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.pdf
    • http://files.natashaemilymedium.com/uploads/1/3/0/8/130873869/xiresetedabutubusuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/14904681816.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/83216504191.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/nagopemede.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7239/files/28270967782.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2548/files/libusijasobarozipezatutet.pdf
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/wefasuzowodojefatoxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/jezujugora.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/46158276749.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/2582795352.pdf
    • https://cdn.shopify.com/s/files/1/0447/3238/3381/files/legend_of_zelda_ocarina_of_time_walkthrough_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/0798/1214/files/4103657675.pdf
    • https://cdn.shopify.com/s/files/1/0433/5029/4678/files/zepufuxufupuwisatemomiwa.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_off00005013.bin
f9e32047a756e7d47e281efeaaf140a00e562a9e99e917ea1f795065c8d4eea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5013 5544 bytes
font_01_sfnt_off000062ec.bin
e30388b6af6983e4aff29b99f1d0eb1a0be784c53b8ec7e6e398a2312a89df07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EC 9984 bytes

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