Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dfbff789008e032…

MALICIOUS

PDF

38.9 KB Created: 2020-08-21 16:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 190c0efbf70ddf689df407394477aff5 SHA-1: 94edd63e89371d09ef271cfb9b462727c24688c7 SHA-256: 5dfbff789008e0323d8eb78e8e3032903438c142c0cf0e1e1a688b56738ce661
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm infrastructure designed to redirect users to malicious sites. The primary redirector URL is https://ttraff.ru/pify?keyword=orthographic+projection+examples+and+solutions+pdf, which is flagged as malicious. This suggests the document is part of a phishing campaign aiming to redirect users to potentially 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=orthographic+projection+examples+and+solutions+pdf
    • http://files.narrativeimaginings.com/uploads/1/3/2/7/132710784/nubigakunumonejosim.pdf
    • http://files.schumacherbrothersfencing.com/uploads/1/3/0/7/130738732/247995c0f3e552.pdf
    • http://jopugot.ppisurrey.org/uploads/1/3/1/0/131070786/6609440.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4040/7701/files/19410154878.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0438/2959/2214/files/sigmoid_function_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/sukhmani_sahib_in_hindi.pdf
    • https://cdn.shopify.com/s/files/1/0448/0555/4337/files/ypsilanti_township_police_reports.pdf
    • https://cdn.shopify.com/s/files/1/0440/2718/3269/files/glycemic_index_food_guide_diabetes_canada.pdf
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/33882714452.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3674/files/chicken_biryani_recipe_in_marathi_download.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_off0000597c.bin
5b3f98ce3be1110c3c23a7c50b28626b011246305af2d167b56c2fec59e49517
pdf-font-stream PDF embedded font (sfnt) at offset 0x597C 5740 bytes
font_01_sfnt_off00006ce8.bin
178d9fcab317ddf6258688299be0e407e4c03cd9f6c6990e8e550498420f5c02
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE8 9996 bytes