Malicious PDF — malware analysis report

Static analysis result for SHA-256 891e1424073bd4f0…

MALICIOUS

PDF

33.8 KB Created: 2020-08-30 18:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cab3f9f9a58ab228caee44dc2d05819 SHA-1: 2f8ec9439dbbb7b1e4def8dad2a7e1f64a656cd1 SHA-256: 891e1424073bd4f0f927e2b7f3ff72eda8d61c2ca3ffb4d8cf55d97736ba300e
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many of which are SEO-optimized to appear as legitimate documents. One of these links, https://ttraff.me/wix?keyword=las+desmaskaradas+reinoles, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

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.me/wix?keyword=las+desmaskaradas+reinoles
    • https://cdn.shopify.com/s/files/1/0432/9930/7673/files/xowedezurovapoziwus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/48605617235.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/sequencias_logicas_raciocinio_logico.pdf
    • https://cdn.shopify.com/s/files/1/0434/4912/2983/files/tiwetetifubipitadezomut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/romiket.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/vegiduxusuno.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/42762784326.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6949/files/xipirigagojewovaxob.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/kidekikimarutevekexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8372/5990/files/80636985934.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4577/files/23764856423.pdf
    • https://cdn.shopify.com/s/files/1/0437/3911/9765/files/jipakakegevozotegofobu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6667/7655/files/87726262785.pdf
    • https://cdn.shopify.com/s/files/1/0431/6089/5650/files/lutedezevomisiketa.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/38563141940.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_off000046cf.bin
c8942679fd094d4aea08dcdbbea3bdea0c2c718caeee9bdbb8c5db4bca35034d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46CF 4976 bytes
font_01_sfnt_off000057a3.bin
45184bce753a4fd8ae59ce62f9628ce4f17566c8898412bd2710478071eb4d4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57A3 10096 bytes

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