Malicious PDF — malware analysis report

Static analysis result for SHA-256 0526779e7de66e5b…

MALICIOUS

PDF

37.8 KB Created: 2020-08-25 07:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd8d226d4b8858b31a58f19eec179a18 SHA-1: 284991366e827a9bf965e80aff2863819531a29c SHA-256: 0526779e7de66e5b32852ad92f9a40baa835e47f97574dade9eb541016178b6d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to movie content, likely serving as a lure. The presence of multiple Shopify links suggests an attempt to obscure the true malicious destination by using seemingly benign hosting for some of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=rocky+balboa+tamil+dubbed+movie+free
    • http://merolo.camptesahe.com/uploads/1/3/2/6/132696067/b8b9c90.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0028/1762/files/75338004988.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0762/files/cdisplayex_paid_apk.pdf
    • https://cdn.shopify.com/s/files/1/0438/7520/5288/files/2005734437.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/nejatejoxodoxalaboj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/tibepafinujejirak.pdf
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/www._ethiopian_reporter_amharic_newspaper.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0714/files/rolil.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/daxev.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000541d.bin
d88baf431e7b7439af065ce66563b659e18dc744231d1a3f6c27399500fd32ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x541D 5360 bytes
font_01_sfnt_off00006650.bin
31b695688f3ed69795330a03944ded95defbf28b6962c63f31e1e2910c845b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6650 10868 bytes

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