Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a58702b3aaa580…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 06:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b677c57539f6b989b96e966732953eb8 SHA-1: f764b9a80c07c27beda338bf69b99bd97aea18e3 SHA-256: 04a58702b3aaa58030c91fc5cd2bbd7c43e240594bac7c0cedd8aae581434745
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as information about a game exploit, which redirects to a known malicious domain. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute malware or phish users. The embedded URLs are likely part of a campaign to drive traffic to malicious sites.

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/wix?keyword=gta+5+car+duplication+glitch
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b42fd6_64fa1f77c8e648d8b053512da30db695.pdf
    • https://static.usrfiles.com/ugd/4b68be_633b89c6b064443a8610babd3b001267.pdf
    • https://static.usrfiles.com/ugd/b8c837_40d1519768de4423a4f0c07f2cd1766f.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc64a79bd1e343d5a31e14258736a2f3.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/messenger_lite_apk_for_android_5._1.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2093/files/25377587023.pdf
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/kokemifakebovokekono.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/70339562220.pdf
    • https://cdn.shopify.com/s/files/1/0438/7058/4987/files/duwifakuporigusid.pdf
    • https://cdn.shopify.com/s/files/1/0433/6399/1717/files/83812678520.pdf
    • https://cdn.shopify.com/s/files/1/0430/1773/2259/files/simazisedi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5703/7990/files/jadawivitexuvug.pdf
    • https://cdn.shopify.com/s/files/1/0431/6148/5471/files/30523143907.pdf
    • https://cdn.shopify.com/s/files/1/0432/3131/4077/files/73980719892.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_off00006299.bin
5b5c2d1e1add8b151e2c8aa3b1e9c8003cadff24c69d9b0ef96386d88f7ee9b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6299 5312 bytes
font_01_sfnt_off000074a1.bin
3f3ddf3a811c0bddeb61fb54d5e4e6a4e2f017a5669eb7885f7aaec71bf8fe70
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A1 10148 bytes