Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0e3a3cef747c5b…

MALICIOUS

PDF

42.5 KB Created: 2020-08-04 19:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98958396352ca3fcff14ea865a2b1926 SHA-1: 870e7a710ab79aa0ebff44def3f0b1799ce09d28 SHA-256: cd0e3a3cef747c5bb33df44071ce48f89e7ceb21947dddf4455f1ebb62593e3e
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious content, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=lipton+biology+of+belief+pdf. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. 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.ru/pify?keyword=lipton+biology+of+belief+pdf
    • http://files.students2masters.com/uploads/1/3/2/6/132681579/788cc1ba9b6.pdf
    • http://files.altcaresolution.com/uploads/1/3/0/7/130775942/c73604b77f.pdf
    • http://files.learningthroughteaching.com/uploads/1/3/1/4/131406518/8484fb02abc.pdf
    • http://files.americanmoments.net/uploads/1/3/1/4/131406807/8f5787ca.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/27593309680.pdf
    • https://cdn.shopify.com/s/files/1/0437/8918/9272/files/rivofotitolefunek.pdf
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/kilapebizuko.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/41277064553.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/78066568612.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1167/files/11428528858.pdf
    • https://cdn.shopify.com/s/files/1/0437/3266/4481/files/70135337725.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/san_jose_state_campus_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/4850/8311/files/11639265988.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000685b.bin
04531f24eb6eaf71513d8a04f90829d04e5e81616c32d1e1f99560d30b912148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685B 4908 bytes
font_01_sfnt_off00007934.bin
1dee86c92c4c4cdf0361089cac48afe489249ed8f2084a5042799efb62dc0aeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7934 10504 bytes

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