Malicious PDF — malware analysis report

Static analysis result for SHA-256 e780a01c37e4a7ea…

MALICIOUS

PDF

42.1 KB Created: 2020-08-04 13:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6e441ab467da12673c2fa4647564d54 SHA-1: bf169bdac5a9737d6b7b027d0e9df700ab08222b SHA-256: e780a01c37e4a7ea68d8155e6a81c7cb1845a92f3cb00cd724224245226166a8
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 text related to a book title and the PDF creation tool, suggesting a lure. The heuristic firings indicate the PDF is designed as a link farm to malicious infrastructure, likely to redirect users to further malicious content or phishing pages.

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=a+practical+english+grammar+4th+edition+pdf
    • http://files.vintageindustriesinc.com/uploads/1/3/2/6/132695663/kabobutidetos.pdf
    • http://files.calumandkimstuart.com/uploads/1/3/0/7/130775372/6276696.pdf
    • http://files.readingfamilyaid.org/uploads/1/3/0/9/130969965/3306600.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/46989312288.pdf
    • https://cdn.shopify.com/s/files/1/0430/8864/2197/files/ruxasaboguzupege.pdf
    • https://cdn.shopify.com/s/files/1/0438/1048/8477/files/60504489338.pdf
    • https://cdn.shopify.com/s/files/1/0436/2688/9374/files/14236383401.pdf
    • https://cdn.shopify.com/s/files/1/0432/4337/2703/files/amtrak_empire_builder_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1276/files/58898794801.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/11672080416.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6469/files/tipufijineluwaluru.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/44721050875.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/jifemelitesalelofa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24370467333.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_off000065be.bin
f35d338af140166c8123207abfbbebccc1df19105c86be3c62be3615d51d1bcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BE 5648 bytes
font_01_sfnt_off000078c8.bin
77e495acd85ec952688728d7d9451a98d89b069b2934cad724dc65dcd46d4a92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C8 10152 bytes

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