Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde1b549920927c8…

MALICIOUS

PDF

69.4 KB Created: 2020-08-20 22:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e74226100075c8023a1a0ca34e9fde01 SHA-1: 0e2f1b79a51f16df7bcd3acabeb6a24cdbc6d133 SHA-256: bde1b549920927c8ad6c2541e2dee583f7ee9f2aafb4e4a9363bcf49aa183cde
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to shopify domains but are likely part of a link farm. One critical heuristic identified a link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, also contains the URL for the ttraff.com redirector, suggesting the primary intent is to redirect users to malicious infrastructure.

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.com/pify?keyword=software+architecture+definition+pdf
    • http://kusokipo.bulldogsoflongisland.com/uploads/1/3/0/7/130776158/fobufob.pdf
    • http://files.mymoneybuilder.com/uploads/1/3/0/7/130775897/xituv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/natukorov.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/35272653644.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/bad_boy_buggy_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2501/4685/files/nuxus.pdf
    • https://cdn.shopify.com/s/files/1/0438/9116/3291/files/open_sales_order_report_quickbooks.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pisanebemewamabojesodid.pdf
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/59814423921.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/74224713292.pdf
    • https://cdn.shopify.com/s/files/1/0438/6412/9696/files/galotakubebigamizobu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2115/files/pevafegixotinaladopagejeb.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d329.bin
6d86ec884ca7d8b189eb0d36a7f65a35acf92ba35427dee181279e7d878db8ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xD329 5228 bytes
font_01_sfnt_off0000e4f6.bin
e8cc9704eed36f719205ce68f57d835bd84251c61ce484e66f063c63f76d25c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F6 10404 bytes