Malicious PDF — malware analysis report

Static analysis result for SHA-256 1690a45250d57c95…

MALICIOUS

PDF

33.1 KB Created: 2020-08-26 02:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5a6b29774e41b0036a65fa53116a574 SHA-1: 54659fd915819da5773f2270325915cbebe23348 SHA-256: 1690a45250d57c9567b371ec5982868ec28976c3e6783f0aaf751b24bc820615
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a deceptive lure related to a movie title and embeds a large number of external links. One of these links, https://ttraff.ru/pify?keyword=abrahaminte+santhathikal+movie+onlin, is identified as a known malicious redirector. The document also exhibits characteristics of a link farm, with many links pointing to PDF files hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.ru/pify?keyword=abrahaminte+santhathikal+movie+onlin
    • http://zabizul.frio4jrivercamp.com/uploads/1/3/1/0/131070374/vumokorasur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/honda_gc160_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/2053/2386/files/gilly_hicks_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/model_bordereau_d_envoi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/charge_sensitivity_of_ballistic_galvanometer_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/degevelok.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/analisis_morfosintactico_de_una_orac.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/pulanojipikobiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6599/9511/files/multiply_2x2_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/game_blade_sword_of_elysion_apk.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_off00004371.bin
23dc01a6f81c1a0dd135c962e95f318230b6e2bcd8e8fc1f7dbbdf6bf0cc4e33
pdf-font-stream PDF embedded font (sfnt) at offset 0x4371 5176 bytes
font_01_sfnt_off000054e8.bin
7c2d5f4cd5bdd938992a0794f4f9c9f55f765963df019a5e5367f5b0fa2f57aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x54E8 10312 bytes