Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f49be5b82304729…

MALICIOUS

PDF

68.5 KB Created: 2020-08-24 12:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfaaa39d86193960788e13f3b2ee47cb SHA-1: ad7ef438695261c379c1348958fecb72b8cc2366 SHA-256: 0f49be5b82304729b882be511e94224cc26ca04ac84509dd15e1da083a4b7057
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that mirrors the redirector's target. This suggests the primary purpose is to direct users to malicious content, likely for phishing or malware delivery.

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=bekhayali+song+of+kabir+singh+movie
    • http://fegavoxil.conquesteducation.com/uploads/1/3/1/4/131453723/jerifitenekagipu.pdf
    • http://files.psychoneconference.org/uploads/1/3/0/9/130969489/nogewukixudara_wejigaxetelives_zixufexo.pdf
    • http://vaxajun.trulymedium.com/uploads/1/3/2/3/132302921/7325384.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/application_letter_for_fresh_graduate.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/fazinabexoti.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/49603217566.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/non_life_insurance_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/33774064049.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8541/files/cdac_question_paper_2017.pdf
    • https://cdn.shopify.com/s/files/1/0439/0571/2296/files/ashfield_public_school_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/woods_bush_hog.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/libro_azul_alcoholicos_anonimos_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/anatomia_e_histologia_del_cuello_uterino.pdf
    • https://cdn.shopify.com/s/files/1/0433/6579/3942/files/59104145778.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/fancy_pants_adventure_1_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/files/48645256463.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6c8.bin
1fb50d02c260da165d29e6ccf53ee2bcce8ca0d8e268ad9b66b03ca23edf5d06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C8 5596 bytes
font_01_sfnt_off0000c9b5.bin
001713988b41e4c3de5eec1e5e784334712b309259a0b98b14bd4ae385a700b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B5 10936 bytes
font_02_sfnt_off0000ef1b.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 16164 bytes

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