Malicious PDF — malware analysis report

Static analysis result for SHA-256 4666893dbddd5071…

MALICIOUS

PDF

44.4 KB Created: 2020-08-14 20:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6ba2712571042e3545b976267b75ec8 SHA-1: 950622378bc8ef0aedb230245bc634382bb21e61 SHA-256: 4666893dbddd5071b9003fa4e96c7e60f9219c842d6e919a995650ab24b64730
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as 'introduction to anatomy and physiology test answers'. This link, 'https://ttraff.cc/pify?keyword=introduction+to+anatomy+and+physiology+test+answers', leads to known malicious infrastructure. The PDF also hosts a large number of external links, many of which point to potentially malicious content, suggesting a link farm or distribution mechanism for further payloads.

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=introduction+to+anatomy+and+physiology+test+answers
    • http://files.mellamarministries.com/uploads/1/3/1/4/131406663/gibeje-gapokumufusog-nopotudesevofeg.pdf
    • http://files.serenarilab.com/uploads/1/3/1/1/131163737/8263448.pdf
    • http://zuzekoji.unicuswatersolutions.com/uploads/1/3/0/8/130814328/68b319d6ed865e.pdf
    • http://files.creativationevents.com/uploads/1/3/1/3/131380493/6612511.pdf
    • https://cdn.shopify.com/s/files/1/0436/2679/1075/files/57063712425.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/duvonupolaludar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/pilatugogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/dobosejegixodoto.pdf
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/baixar_weeny_free_extractor.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/fululuxoxufagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/xfinity_stream_app_roku_won_t.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/purebdcraft_texture_pack.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_off00006d82.bin
2615763461d7186e1071a17e312ac76bf6eba27526923654554696a525fc74a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D82 5620 bytes
font_01_sfnt_off00008081.bin
5ee85db0666e377e32fce03936bf869a4aa7fd116e80231d1b97362d3979c548		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8081 10560 bytes

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