Malicious PDF — malware analysis report

Static analysis result for SHA-256 7654794fad2ef748…

MALICIOUS

PDF

35.8 KB Created: 2020-07-27 14:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c122f20dbb283cf9dbe9b49f4eec8bc SHA-1: 6638946453420cd3fa7e341aa820c144c672ecb9 SHA-256: 7654794fad2ef7485ddd11d77bab0f53a78bacb5c59d82efd710fdc9ffee0c67
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector at 'ttraff.cc'. The document body, though heavily obfuscated, suggests a lure related to a 'weather report'. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site.

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=mahabubnagar+weather+report
    • http://files.choosefreedomlovely.com/uploads/1/3/1/0/131070030/8e886fa47a0d92.pdf
    • http://files.huningtonchase.org/uploads/1/3/1/4/131454916/4564040ccd88d5.pdf
    • http://files.lakecountryphoto.com/uploads/1/3/1/0/131070089/3902508.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/29504387679.pdf
    • https://cdn.shopify.com/s/files/1/0433/4813/2008/files/talefasogetixalizep.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/vebajojiki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/81568733490.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/samefuwumaxejupositaje.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/25149336584.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/84766511882.pdf
    • https://cdn.shopify.com/s/files/1/0436/6041/1033/files/wamodokaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojijemorewowasimagaxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/xabimavewag.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/38277567335.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_off00005006.bin
1d94f77011711a35115fb4df05c888e82841b60c92a6fb04590888fd546eb11a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5006 4940 bytes
font_01_sfnt_off000060d7.bin
8d54902d9e673d5d871f8b81d579d8b2a637a1fde00a103206964a9b531d626a
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D7 9852 bytes