Malicious PDF — malware analysis report

Static analysis result for SHA-256 532029313030a379…

MALICIOUS

PDF

46.2 KB Created: 2020-09-03 03:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 54a9b4dc67b46cf52a44dbac08561658 SHA-1: a518b706c109eb58f7a1a93aee342337b022eea9 SHA-256: 532029313030a379fa300f8e8507ab3a75eb8bdaae2241d349b66f38a8e4570b
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as educational content, aiming to lure users to a malicious site. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm or SEO poisoning attempt. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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.club/pify?keyword=huckleberry+finn+reading+questions+answers In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/drip_irrigation_design_and_installation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6608/7838/files/free_annual_credit_report_login_experian.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/identificar_la_definicin_de_liberta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/zamiripobed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/rebufoxikeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/50913701761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/blocky_farm_racing_and_simulator_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7956/3432/files/virejupununajubunepox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/gimmemore_logo_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/wupudires.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/gumazewoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/baaghi_movie_theme_song_ringtone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3018/4087/files/fobalibazivalesobal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1435/7145/files/fiwezanetota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4240/6305/files/48462009608.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7469 5672 bytes
SHA-256: 3aa1c4eb4d815662d681803d9673858f5a2557f1f061c9ed83bd933d56980bff
font_01_sfnt_off000087d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D3 10012 bytes
SHA-256: f4f64060b28cd6732e2dbb0831d1178bd19cbef87e98afec41fde8f26968d73c

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