Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3445d0ebfd7a2e3…

MALICIOUS

PDF

34.2 KB Created: 2020-08-09 16:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd1f8911a47c09233cc6dfc2b774ea98 SHA-1: e0e1274ab65e56ea719ed22308b29cac851865ac SHA-256: e3445d0ebfd7a2e389b2754c8ef67b10d507bbffa97d30f2ebdb1c2d21ccb4ea
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also features a link farm, suggesting an attempt to manipulate search engine results for PDF downloads. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be a lure to download content via a malicious URL.

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=canzoniere+magnum+pdf+download
    • http://files.vedranpasalicart.com/uploads/1/3/1/1/131164081/vodepubonigi-susesow-kaxamil.pdf
    • http://files.branperf.com/uploads/1/3/0/8/130813887/7164095.pdf
    • http://files.educateachildinpakistan.org/uploads/1/3/0/8/130874495/c4256cba7f.pdf
    • http://files.slow-studio.com/uploads/1/3/1/1/131163643/xasubasozuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/37357023848.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/rifelodar.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8280/files/2574090758.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/49163139263.pdf
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/rukugoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/xizoxagulinibis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/72311653829.pdf
    • https://cdn.shopify.com/s/files/1/0433/6720/2974/files/wubukekegi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/mufepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6530/files/16024792480.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/86751814997.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/2012_buick_lacrosse_owners_manual.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_off00004867.bin
209f0add0d9d69496e7ff03d72be356ee0ae629c2d645c3f17dfa83ae3830031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4867 5228 bytes
font_01_sfnt_off00005a35.bin
4bf1123e6b74cab7b97d859d05826f2f907f461bdbccb6520f7268fbdfa4b004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A35 9904 bytes

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