Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de485a406038d75…

MALICIOUS

PDF

49.0 KB Created: 2020-08-18 16:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db425c814a1ba11632ef25df7d757706 SHA-1: ef2ab811e5633c9b043e005bc8e4ae1ef4892b1f SHA-256: 6de485a406038d7554c4fba9e87db0a17563190653686bea4c9780544faa9806
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to potentially malicious redirectors or link farms, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=rustoleum+spray+paint+msds+sheets
    • http://buminikuf.thebombayglutton.com/uploads/1/3/0/8/130814328/f5ddc6e6e.pdf
    • http://jasep.daxandivyboutique.com/uploads/1/3/1/6/131637136/nukezalufawan.pdf
    • http://files.staceyharris.co.nz/uploads/1/3/1/4/131437889/7711263.pdf
    • http://jodoban.watertheessential.com/uploads/1/3/1/6/131606227/vajitegazonogise.pdf
    • http://files.nicolleducation.com/uploads/1/3/1/6/131606762/7720917.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2799/5552/files/ledupulimas.pdf
    • https://cdn.shopify.com/s/files/1/0437/4865/5265/files/56285163223.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/55657461109.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/dilipekaxapisapof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/68425909545.pdf
    • https://cdn.shopify.com/s/files/1/0454/8486/7736/files/chakmanjo_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/inorganic_chemistry_chemical_bonding.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/jevibojusoroxebalanobanoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/fungsi_manajemen_actuating.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sozolomunegodufedawugiwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4742/files/muwelis.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7938/files/buscopan_composto_gotas.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_off0000719d.bin
0b8abef96655d6a26743732f0f5a92ef54f37b8719b2e6e2cdfc4f92db171291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719D 5308 bytes
font_01_sfnt_off0000837f.bin
c54dc5a354dc169d40a34af14c752ebd80d8f8df3b95b5088247b67fbfc2bc14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837F 15960 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.