Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb364b9f1eff7b7…

MALICIOUS

PDF

51.2 KB Created: 2020-08-03 15:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 927a2f7c7da114ac50686114d4c08075 SHA-1: 6280f7dc65068155401fa0c742e2826ede34bdc3 SHA-256: 0fb364b9f1eff7b7026ec92df5a525c84c0f3df69f7fd468aab1f54d24f52aa7
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, and is part of a link farm designed to appear as SEO-optimized content. The document body, though heavily obfuscated, contains URLs that likely serve as lures to malicious infrastructure. The primary attack pattern involves redirecting users to malicious sites under the guise of providing a tutorial.

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=digital+painting+tutorial+pdf
    • http://files.statedshowroom.com/uploads/1/3/1/0/131070212/3bf8e28a0cb60a.pdf
    • http://files.joseluisperezjim.com/uploads/1/3/1/3/131383553/gejuxab.pdf
    • http://files.dontcallmecameron.com/uploads/1/3/2/7/132712333/vodokavibifileru.pdf
    • http://files.mariaestrellamusic.com/uploads/1/3/0/7/130739951/9149267.pdf
    • http://files.alenaephotography.com/uploads/1/3/0/9/130969761/zuluwajuzoziluraj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0434/8480/7334/files/towijufuzidov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8310/4409/files/sajovuzuxeta.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2048/files/genonitan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/bijixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1723/9704/files/55458495592.pdf
    • https://cdn.shopify.com/s/files/1/0440/5005/5318/files/natunukufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3570/files/3911748539.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/35780834160.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/4215793486.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/49044989899.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_off00008bdd.bin
7da1be4e6da3d2a927edf32ac518bdc4a63bb5d0e92443af468d529b630d3d54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDD 5028 bytes
font_01_sfnt_off00009d10.bin
efd18b96d6085fa4c3cdd0bcb88732fbfa15088fdb754170605e4b2af985d00c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D10 10136 bytes

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