Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe67ba1b11ea9dd7…

MALICIOUS

PDF

35.8 KB Created: 2020-08-18 16:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05834b899cd60365a10484efaa4f009a SHA-1: 41777fd6f015e8bb608902e5e3d07d7dd1328376 SHA-256: fe67ba1b11ea9dd731bc7b8593c4d85a12fa6741a4b1b0be245a69fad4a23812
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free game download for Windows 10. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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=bookworm+game+free++for+windows+10
    • http://files.healthyactivemalaysia.com/uploads/1/3/2/6/132682295/tegoxatejiteza.pdf
    • http://sovaro.mycoachisabelle.com/uploads/1/3/0/9/130969060/3861282.pdf
    • http://files.yamawarashi.com/uploads/1/3/0/8/130874257/572234d6.pdf
    • https://cdn.shopify.com/s/files/1/0437/2129/3974/files/los_de_abajo_manuel_azuela.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/limotanozuromifuxedaxovor.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/76050097076.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/batuque_lorenzo_fernandez.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/paste_collapse_r.pdf
    • https://cdn.shopify.com/s/files/1/0434/4161/9105/files/to_be_past_tense_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/lororuxabuwepoka.pdf
    • https://cdn.shopify.com/s/files/1/0430/6996/4439/files/57672373317.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/zokagijivebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.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_off00004d11.bin
50f30cfc47020a03525a563e757459c5a1adf59618a18f087d070c7847b86f0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D11 5592 bytes
font_01_sfnt_off0000601a.bin
d88583d81521639ecafc9b38b49b23ba7e5b7928b9211efb96bd3de87e6aa9dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601A 10176 bytes

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