Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3a92c5c65f9a32…

MALICIOUS

PDF

40.5 KB Created: 2020-08-17 14:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a70af167386ddb3e10d84eb23732c1b5 SHA-1: e32066d741660ced663cdeb00b06054a0d247d16 SHA-256: cf3a92c5c65f9a3230be789a34e9a892cbc667f08570babb45fc506592a4c97e
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free PowerPoint template. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the embedded URL confirm this. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, suggesting an attempt to distribute malicious content widely. No scripts were extracted from this sample.

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=save+earth+powerpoint+template+free
    • http://files.luskccmaths.com/uploads/1/3/1/4/131454581/2deff6e4e6a1.pdf
    • http://files.mikewritesabit.org.uk/uploads/1/3/0/7/130775557/2989903.pdf
    • http://pokop.revenuerampup.com/uploads/1/3/2/6/132682107/1042222.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/6006/files/55784176484.pdf
    • https://cdn.shopify.com/s/files/1/0432/3537/7307/files/2572132101.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/biwesakovapu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/wizubulimoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89352644259.pdf
    • https://cdn.shopify.com/s/files/1/0440/5942/6968/files/suprise_arizona_zip_code.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/friendship_story.pdf
    • https://cdn.shopify.com/s/files/1/0437/7824/4765/files/64376690766.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0012/files/jeevan_shanti_policy_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9762/files/75251041794.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fufabolip.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/14256301103.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_off000060c8.bin
facce50c0f056b9d5c9237997ce90ef4fa032008c03dc4aac65b0a95a24af173		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C8 5216 bytes
font_01_sfnt_off00007270.bin
171b98c1b3d002feb00b2a6a6a456013e9f9958e8fc198038d01c8b46fb6a14b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7270 10156 bytes

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