Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9fc84ca0a04286…

MALICIOUS

PDF

37.9 KB Created: 2020-08-02 21:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3b181e71d5b8d7a5294a453d3bc9a0d SHA-1: c587aa7fcc230e5237491d22d7a11d0b0b4f7697 SHA-256: 9a9fc84ca0a04286c83523b1663f2cc31cdee48a688bd05eef1ef9064ddb7bfb
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.com/pify?keyword=ny+dmv+manual', is identified as a malicious redirector. This suggests the document is designed to lure users to malicious websites, likely for phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=ny+dmv+manual
    • http://files.kaylahmarieartworks.net/uploads/1/3/0/7/130776483/ef0aebb5.pdf
    • http://files.blackswampaths.com/uploads/1/3/1/3/131378779/ef0f8c.pdf
    • http://files.thewritingtreasurechest.com/uploads/1/3/1/4/131437865/785023.pdf
    • http://files.bewellacupunctureclinic.com/uploads/1/3/0/8/130873758/jixerupezes.pdf
    • https://cdn.shopify.com/s/files/1/0440/4147/0117/files/54092566509.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/vudikawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/nogil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99289858455.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/81408165856.pdf
    • https://cdn.shopify.com/s/files/1/0435/4880/3227/files/lanapukoronubozewivol.pdf
    • https://cdn.shopify.com/s/files/1/0438/3608/0288/files/79775309926.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/99672833463.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/sufupaned.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/xilomi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8870/5688/files/nasoxomowifukopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/12149441975.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/83779699245.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_off000056fe.bin
0c32ce7db4c20a7935ad224ae0a80544055456c74003c20d167e0c0ab1a5420d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FE 4828 bytes
font_01_sfnt_off0000676b.bin
8b1d047f538ce4c3c4f146fff25babfc26046047c173f59e68da2eb0ece58a16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676B 10368 bytes

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