Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d7d2bd9bccf7fe…

MALICIOUS

PDF

44.8 KB Created: 2020-08-21 12:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb50010f0a27e8b01e418592ebf3a0de SHA-1: 73874e1cca1eee27f70c520a5d7e13a30fb51a22 SHA-256: 76d7d2bd9bccf7fe21501b4d005fde5721d4fbcabf747aee1ee51e9e852d82d5
154 Risk Score

Malware Insights

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

The PDF document contains a prominent link disguised as an offer for free online casino games, which redirects to a malicious URL. This URL is part of a redirector infrastructure designed to obscure the final destination, likely a phishing page or malware download. The presence of a large number of external links, many pointing to Shopify domains, suggests a link farm SEO tactic to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=play+free+online+casino+games+without+ing
    • http://figovevek.yogaaah.com/uploads/1/3/0/7/130739845/kabovijugokufet_mekejoxejabo_namigukovizux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7142/files/tonematexafevixoxufopip.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/55123891328.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/solidworks_2d_drawing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/fipewedagasupena.pdf
    • https://cdn.shopify.com/s/files/1/0444/3347/3702/files/change_axis_labels_ggplot2.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/6446376061.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/24672438168.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/ark_survival_evolved_switch_size.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000652d.bin
423be56520993f411d14ac735f389f36c6adf8954cc76f636d737a65927675ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x652D 5372 bytes
font_01_sfnt_off00007756.bin
cb59557195f176d7424f4f6d8221197b80e494e503a23a62e43d56b8fd20535c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7756 9768 bytes
font_02_sfnt_off000098c0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x98C0 4324 bytes