Malicious PDF — malware analysis report

Static analysis result for SHA-256 182771be8200585b…

MALICIOUS

PDF

33.6 KB Created: 2020-08-25 01:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3c1301ce5cfb44ba05b9c0816ca60c3 SHA-1: cdab92fdf726fcb18e3acc75fb60b0d3e0b8dfbc SHA-256: 182771be8200585b4d81c00da9ffde0bd735e2b8d3f9cc1d0c7713a045f72ed9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify, suggesting an attempt to manipulate search engine results or distribute content. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to sheet music and the URL that triggered the redirector, reinforcing the lure.

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.ru/pify?keyword=mercy+brett+young+piano+sheet+music
    • http://files.transactionbankingacademy.com/uploads/1/3/0/9/130969879/debetosedov-goguwafemavijur-vogupevewemelo-kevomerasedos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/0316/2269/files/makenowumatonepipaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/41938041176.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/57451700911.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/97329917035.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/51546541038.pdf
    • https://cdn.shopify.com/s/files/1/0430/0269/1743/files/posix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/53613987374.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/83644014119.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_off00004544.bin
1e231d8fa4c8de2a991cb9075d748329a9913edd3a076f5bb6016fe9a9cb8e9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4544 5564 bytes
font_01_sfnt_off0000580e.bin
6f307314505081b29658c525fec1cf8cb6cc25f94e23c811273d339c84da7a71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x580E 9932 bytes

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