Malicious PDF — malware analysis report

Static analysis result for SHA-256 5167a59acfdc3342…

MALICIOUS

PDF

45.3 KB Created: 2020-08-02 05:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005d6cbc088dc1b0f0d626ad1312a11f SHA-1: b203ccfd29ed1305f1dee2f7b9677d8c33035948 SHA-256: 5167a59acfdc3342db05db40050809e7e546775ac0f339661c1151bf06944364
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link to 'ttraff.cc'. The document body, though partially garbled, contains text related to 'Kb to mb' and includes the malicious URL. This suggests the PDF is designed to trick users into clicking the link, likely leading to further malicious content or phishing attempts.

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=kb+to+mb
    • http://files.sylverdesign.com/uploads/1/3/1/6/131606331/88d7deba1b8da3f.pdf
    • http://files.communitybaptistcoldlake.com/uploads/1/3/0/7/130739072/benisulujol_zekasanatina.pdf
    • http://files.kmcauthor.com/uploads/1/3/1/4/131408913/gujutopi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5481/files/17179823481.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1575/files/raferabolinodulezomud.pdf
    • https://cdn.shopify.com/s/files/1/0439/5122/7038/files/roxulirivurekinosu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4385/5258/files/timofosiwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/41144547029.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2621/files/54726347502.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/51138065453.pdf
    • https://cdn.shopify.com/s/files/1/0428/8439/9270/files/77204926272.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/40464469274.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/26043460711.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/wizakijividiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/epic_care_presence.pdf
    • https://cdn.shopify.com/s/files/1/0440/1607/4902/files/53104614462.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/dadik.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_off00006900.bin
c7df6e08a9dfa56ac13d8cc2c2dc6a16f52001ebfcafff822b37761f0e55d5e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6900 4424 bytes
font_01_sfnt_off00007805.bin
0878377f33b33eee4f030bca98d79c66a24aebbd36bac9f6749b1788bd9cd7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 15076 bytes

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