Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5e11ff31a5a661…

MALICIOUS

PDF

46.0 KB Created: 2020-08-21 01:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e673b9ff53ab9cf6a3e0fd4877c2dcad SHA-1: 6822e6fc83c85639055d9bb75f117d91c4dadd75 SHA-256: 0d5e11ff31a5a661928f390141b6a86fb75936f681a1c7f1e641d32a4f4a4856
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector suggests an attempt to lead the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

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=yara+international+annual+report+2017
    • http://josis.catholiccharitiesvc.com/uploads/1/3/1/6/131606337/tafeze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/maduxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/0722/7542/files/how_to_draw_a_worm.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/87999233508.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/cellule_de_crise.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4166/files/vogaluxepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/lolikulofuvipozilet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/uc_browser_mini_app_old_version.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/setilodowafovabikeziwun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8316/9943/files/principles_of_virology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/5037/5070/files/endothermic_and_exothermic_chemical_reactions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/kopowopogu.pdf
    • https://cdn.shopify.com/s/files/1/0443/8091/3830/files/advanced_custom_fields_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/72703532820.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/6005/files/nedilowob.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_off0000758e.bin
36a01a4d61992e6060096dd7af189fe457885209d3986262a0885b51f0e67c52
pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 5004 bytes
font_01_sfnt_off000086a7.bin
1997e9bf526750a0e8fc6b6a20a40444438f664da74ede69984c1174eca6de59
pdf-font-stream PDF embedded font (sfnt) at offset 0x86A7 10736 bytes