Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d987f3d3678d6b…

MALICIOUS

PDF

35.3 KB Created: 2020-08-16 11:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cef669fded0d353aed55d7194ffa359 SHA-1: 089aebe010fd80f6985bc4bda8f61748328d5582 SHA-256: 07d987f3d3678d6bc23b0f814b8abaaa401f4a64f3d0874379a3f7dfb02d19a9
154 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'the losers 2011 full movie' and the malicious URL, suggesting a lure for users seeking entertainment. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence score support the malicious classification.

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.cc/pify?keyword=the+losers+2011+full+movie
    • http://zenop.andrewveivers.com/uploads/1/3/0/8/130813042/kugimofewigo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/91587404352.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/foluxemuvaweguludulimar.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/nsk_bearing_housing_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/2844313813.pdf
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/amines_jee_notes.pdf
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/geketap.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/62664913835.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/41943087247.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/zuduwugu.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_off00004ca1.bin
ef468f02a4bbb6846928c4c48bbbf686a5955b34d4577cd967770b7f4a44b7bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA1 5132 bytes
font_01_sfnt_off00005e04.bin
1248359fc79a7d2de925888d47b13230313ab94b8e88549341c4879a1d11edd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E04 10264 bytes