Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6f028d89442d03…

MALICIOUS

PDF

41.9 KB Created: 2020-08-25 01:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8943a3a3da77b7a3cccdfb7e6f0facd SHA-1: 0d959dd74bea3bc44b7b4e9b72653095caed45d5 SHA-256: eb6f028d89442d03cde366ffbe9ffa75a0d08c74e24114d24a0eee69fd22fbf4
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Occurrence variance report template' and the malicious URL, suggesting a lure. The presence of a link farm heuristic further indicates an attempt to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=occurrence+variance+report+template
    • http://files.cromsphotography.com/uploads/1/3/0/8/130814636/7352872.pdf
    • http://files.yourkentuckydj.com/uploads/1/3/1/3/131379833/5315810.pdf
    • http://files.neperformingartsgroup.org/uploads/1/3/0/9/130969709/lupovawojixidawap.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/xulosopofegutonuruma.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/13651965205.pdf
    • https://cdn.shopify.com/s/files/1/0451/3277/5589/files/65383183373.pdf
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/52564067607.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/bekekudeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/tubutitofevepojorivikene.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/jasofiwavowude.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/bozepebu.pdf
    • https://cdn.shopify.com/s/files/1/0455/7858/4229/files/27786079235.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/forewoselazeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6082/files/97643038868.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_off00006608.bin
e4887d558a0415bdf9e94fce9b37fc34b6ea0232919858904c01b0af566bf11e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6608 4988 bytes
font_01_sfnt_off000076e9.bin
040dc55e1c65d07183ce2d0b678d8e37999fd9b99a1f189609d89c0aec582f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E9 10560 bytes

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