Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14ca369c76a4f12…

MALICIOUS

PDF

47.7 KB Created: 2020-08-16 22:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022efaef17090e5efbce94f2aa6fd9cf SHA-1: c23fdfa4cc0aa86802d2808b9345fb3f8a9617b3 SHA-256: b14ca369c76a4f12e4cf5f2df9c15c4b96c11e4fd23308633b622373407e0269
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Salvador Dali biography pdf' and a URL that appears to be part of a link farm designed to manipulate search engine results. The presence of numerous Shopify-hosted PDF links, combined with the malicious redirector, suggests a phishing or content-luring campaign.

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=salvador+dali+biography+pdf
    • http://faper.joyandjoebaby.com/uploads/1/3/0/8/130814179/6449051.pdf
    • https://cdn.shopify.com/s/files/1/0440/1741/8405/files/rads_error_lol_2016.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/retosajonusuvufirebowur.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4743/files/bolagidaxapejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/sewumodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/jexedepogadadegipaka.pdf
    • https://cdn.shopify.com/s/files/1/0430/8353/0394/files/2759833786.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/duzer.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/70475832722.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/84967301717.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/46218516961.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/acomaf_coloring_book.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_off00007c5a.bin
3490e479d185201cb80f20d22642208882665f35fb3c15db02f1af265aa78776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5A 5528 bytes
font_01_sfnt_off00008f20.bin
900ba66dac2a049d7a48fb1ef7a1f40061d23326d39dad6cb86c0aaf3ccc1ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F20 10080 bytes

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