Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b2b6332eca5c35…

MALICIOUS

PDF

38.9 KB Created: 2020-08-16 12:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2366f6d1e29d42783d1a74c996ca3a9 SHA-1: 3fde59c540c8d0b91c0aca1af1289c5abb36dbc8 SHA-256: 06b2b6332eca5c3538cc9011a194f40b7ec78b1e2e7361fa1f2ed7eff769c3b7
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=physical+chemistry+questions+and+answers+pdf', suggesting a lure to a malicious site. The presence of multiple embedded links and the ML classifier's high confidence score indicate a malicious intent 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.com/pify?keyword=physical+chemistry+questions+and+answers+pdf
    • http://files.elcenzontle.com/uploads/1/3/0/7/130775866/figoro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/conversion_kg_to_pounds.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wekisod.pdf
    • https://cdn.shopify.com/s/files/1/0440/8321/6549/files/jegujubigakuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/96632438152.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/tagimanep.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/drake_bell_height.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7570/files/muvebezenolemawonobefure.pdf
    • https://cdn.shopify.com/s/files/1/0450/1949/6606/files/alcatraz_season_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/9279/3757/files/brain_teasers_high_school.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_off000059b3.bin
5822c16f4542f205bc93568bee5ec4ccfb0c3c070b30a11d7192316347e0dfcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x59B3 5716 bytes
font_01_sfnt_off00006d05.bin
940c2fb70d7c9ee1f2c8340afb3ed2cb16e4cced439b90ae7c45c12c7e7ae794
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D05 9864 bytes