Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8a07aa236a6b73…

MALICIOUS

PDF

37.5 KB Created: 2020-08-19 15:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a23cf9aa82d577fa1c578ffcf7245620 SHA-1: 448d816c941dc797c4782fee3ba4d2659fbd5657 SHA-256: db8a07aa236a6b7391d243836ed93ff578280aff093e18a931584f9cba161a54
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 primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'corrugated sheet metal for sale' and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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.cc/pify?keyword=corrugated+sheet+metal+for+sale
    • http://rodekofab.ctknj.org/uploads/1/3/0/7/130740013/8c6bcb7.pdf
    • http://files.bayviewlife.org/uploads/1/3/1/8/131872238/zofuliroze.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3895/files/75635536440.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/zovonolabikozazutul.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/63217982601.pdf
    • https://cdn.shopify.com/s/files/1/0440/4045/4294/files/6810488364.pdf
    • https://cdn.shopify.com/s/files/1/0434/0544/3233/files/46214200910.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6272/files/kuvapogabovosidebesibawew.pdf
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/39242780853.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/61244714075.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/26954508997.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/2072579388.pdf
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/samsung_rfg298hdrs_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_off000055cc.bin
151ad0162edc360a1c46e8911e07f066ce13b291c38564b7edc636a7809783f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55CC 5228 bytes
font_01_sfnt_off00006769.bin
9c0e04de34eb608dc6dd132175846b1f240711df9b1cdc801710b959cc45b18e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6769 9992 bytes

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