Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff12c2aa1c1d4720…

MALICIOUS

PDF

42.0 KB Created: 2020-08-26 09:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 22c0d03153d9ff7fb4d0ea9b601d5a43 SHA-1: 332eb2798a6eaa0d47928c38475f47182876e606 SHA-256: ff12c2aa1c1d472092118d2cc084afe5f2e62fb98fb52e122a6c8e866243f129
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.club/pify?keyword=physioex+exercise+3+activity+8'. It also exhibits a PDF link farm behavior, with numerous embedded links pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, suggesting a lure to a malicious site. No scripts were extracted, but the overall structure indicates a phishing or malware distribution attempt.

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=physioex+exercise+3+activity+8 In PDF document text
    • http://files.xn--sptjeneste-25a.com/uploads/1/3/1/3/131380354/728430.pdfIn PDF document text
    • http://files.pnwbumblebeeatlas.org/uploads/1/3/1/3/131379312/jamisetanotuzava.pdfIn PDF document text
    • http://files.aremembers.org/uploads/1/3/1/1/131163712/9113369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/50758921855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/20389587461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9285/6232/files/holland_america_oosterdam_deck_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/66300879103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/area_and_perimeter_of_compound_shapes_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/pizov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/5126/9526/files/trigonometric_identities_worksheet_mcr3u_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4242/files/avitaminosis_en_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/bobavifal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/40563848860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/short_story_english_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/0732/8675/files/process_control_modeling_design_and_simulation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C8 5124 bytes
SHA-256: 725d929e21f588ca0011e81b7a474a3192088266be34c0b93101401602a43a2f
font_01_sfnt_off00006b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B41 9992 bytes
SHA-256: 278b62ce44827d25d2ac179d4f5f7644cd4bdfd2045ca91ce4b27da6cb91d0cd
font_02_sfnt_off00008d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D26 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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