Malicious PDF — malware analysis report

Static analysis result for SHA-256 6502faa29a210231…

MALICIOUS

PDF

35.0 KB Created: 2020-09-09 11:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e82be8c31059cf3f7ef9e7a9cedcc6b8 SHA-1: 206ef8c36390c0759f937e918fb8bf1f1cb5110b SHA-256: 6502faa29a210231c7cbee4b120c10b0b0a970199c1bce6ef31a69f49f8c254b
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 of which point to what appears to be a link farm designed to host other PDFs. One prominent link, https://ttraff.club/wix?keyword=chapters+brett+young+piano+sheet+music, is flagged as a malicious redirector. This suggests the document is part of a campaign to drive traffic to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and distribute these 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.club/wix?keyword=chapters+brett+young+piano+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/mutuboviwuposidedimi.pdf
    • https://cdn.shopify.com/s/files/1/0468/8320/9373/files/96769503132.pdf
    • https://cdn.shopify.com/s/files/1/0432/2548/1379/files/alpha_amylase_inhibitory_activity.pdf
    • https://static.usrfiles.com/ugd/b8c837_e39d3851763447d5961cc217f26aa39b.pdf
    • https://static.usrfiles.com/ugd/4cf28d_9f1cc7d04416412fb39a59a650f6af51.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_150c182b183a42ed85eb5003a5d440f9.pdf
    • https://static.usrfiles.com/ugd/902d29_73126f0ef00246cc90f2480c16259f59.pdf
    • https://static.usrfiles.com/ugd/8c2e83_451368b2718a4f86a6ac68fcfd3fc6ea.pdf
    • https://static.usrfiles.com/ugd/b5472a_be498d2ce97e41c69aa83ddce2f2899d.pdf
    • https://static.usrfiles.com/ugd/b8c837_39031162c1a244c890e29b41318ea892.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c2e045a93f94478b4936269a56ed123.pdf
    • https://static.usrfiles.com/ugd/19ce5d_9313b547fead4467848002cad2d88d8c.pdf
    • https://static.usrfiles.com/ugd/d38238_1d03977bb5894cd08c45029b1b3cd67c.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_off00004b51.bin
668515143f4b6f79faf5777b0cc88726bf21314ff493e6302bfbec639408548c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B51 5460 bytes
font_01_sfnt_off00005dbd.bin
15d7bf38b83402c236a856c0c5faeb97049ce8068e1afb83603d987a220fb341
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBD 9856 bytes