Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6e9a4bfa214cce…

MALICIOUS

PDF

52.4 KB Created: 2020-08-08 02:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 794adcff02cb0bdbae78c183a470a5eb SHA-1: 944a4bbdee5d728e6af3a0977b72cbb33cf92d4a SHA-256: 0f6e9a4bfa214ccee2938bc4571bb9e91f3bceace63a7d99cc8ee887b186ed71
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as educational content, specifically 'ncert physics textbook class 12 part 2 pdf', which redirects to a malicious URL. This indicates a phishing or malware distribution attempt. The presence of numerous external PDF links further suggests a link farm or SEO manipulation tactic to obscure the malicious intent.

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=ncert+physics+textbook+class+12+part+2+pdf
    • http://files.buildingfutureleaders.com/uploads/1/3/0/7/130775521/9923270.pdf
    • http://files.meaganhesham.ca/uploads/1/3/1/8/131856276/f5047f3bf21c1.pdf
    • http://files.oishijapanesefl.com/uploads/1/3/1/1/131164097/zotugixawiputu-beliximitukana-zijojizugoderal.pdf
    • http://bagikamow.ustore-uk.co.uk/uploads/1/3/0/7/130776433/9828575.pdf
    • http://files.across-africa.com/uploads/1/3/1/4/131413718/waludariz-kaditunumugagus-sanujukefonev-latisusobipa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/nefikubututubisakodigab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9904/files/kutol.pdf
    • https://cdn.shopify.com/s/files/1/0430/9988/1639/files/calendario_rusia_2020_chile.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/ps2_emulator_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/engineering_mechanics_dynamics_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/98536874355.pdf
    • https://cdn.shopify.com/s/files/1/0429/4072/7463/files/oregon_road_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/loxuduludu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/84762212252.pdf
    • https://cdn.shopify.com/s/files/1/0446/7815/2345/files/ink_master_season_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/25300479431.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f84.bin
ddb9287ca1b17ef97e816d29bc14157d0efe2838f7afb7b78f6aaff7439b6ee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F84 5768 bytes
font_01_sfnt_off00009335.bin
2544eb9a400239b7e79c0a964851134d7c2ea35254b1bfa99e486da13493c925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9335 10356 bytes
font_02_sfnt_off0000b6d3.bin
7373f89789605f182c4062f639c1b31dd657dbe3ec06bf5792f5bd327229ac2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D3 3280 bytes

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