Malicious PDF — malware analysis report

Static analysis result for SHA-256 df23106828998eda…

MALICIOUS

PDF

51.0 KB Created: 2020-10-08 15:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8eee66dfff52681129e875caa0a8d02f SHA-1: 5b342a34e3aafae9c8a84de60c032776c43c0d5c SHA-256: df23106828998eda9aacfb03cd25597017b85e1d4fdbbd5b303bed7b4bb694a0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely used to obscure the final destination or serve malicious content. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content through a link farm. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to redirect users to harmful sites.

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/pify?keyword=egg+harbor+township+high+school+demographics In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8468/4706/files/mas_alla_del_sol_letra_y_acordes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2690/1924/files/slush_puppie_machine_instructions_youtube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7102/8896/files/wazade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3902/1982/files/11970101571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/calendario_2019_escolar_2020_andalucia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9535/9637/files/cherry_blossom_design_wallpaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1246/7106/files/what_does_sealing_to_parents_mean.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3745/7575/files/79967441614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a98a9bb-a87e-404c-8583-bdd70ef3bc9a/29642888530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa12f82-8f21-4f22-a7d9-153a340e2028/bezewugifexemedipebeser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a386863-107c-4508-95a6-f216c68a6183/tuneporuzugutup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c08dc48-ae43-4b3f-9b80-feb0d210e937/65907379384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/9395/1132/files/bokefin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/boy_clip_art_face.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9074/2948/files/receta_de_pozole_rojo_de_pollo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D5 5676 bytes
SHA-256: 01cbc7b41bc525b63247be69ecd220a3793daba329511dd2eb019bec95aae170
font_01_sfnt_off00009c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C0A 10140 bytes
SHA-256: 4f8499423f5b057ad2361e3b4dab8575af5a0e6ff3f72e6948a5d968b1c9f65e

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