Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4dced6f61564e01…

MALICIOUS

PDF

39.0 KB Created: 2020-08-12 09:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7c7346302ff4a2c94b2e0a1de1358fe5 SHA-1: 2aa132058fdbd4beeeab60b0e74f9019f1cf9475 SHA-256: c4dced6f61564e0103869bed306406c4137705357b2e96cbb94f541fcfc6f912
162 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, masquerading as a download for educational materials. This is supported by heuristics indicating a malicious redirector and a link farm, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=english+grammar+books+in+urdu+pdf In PDF document text
    • http://files.waynecitysaddleclub.com/uploads/1/3/1/4/131437044/2546967.pdfIn PDF document text
    • http://files.1enchantedcraft.com/uploads/1/3/0/7/130775405/jigabilonabigu.pdfIn PDF document text
    • http://files.arsherbarium.com/uploads/1/3/1/6/131637108/e4adceb6ab3.pdfIn PDF document text
    • http://filukuk.repaythis.com/uploads/1/3/0/7/130740434/vikazovubu_notovunaraj_nikubotowi.pdfIn PDF document text
    • http://files.parkflyersinternational.com/uploads/1/3/0/8/130874339/a73101.pdfIn 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/1/0440/6041/0006/files/1861607650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6428/7651/files/7901586439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/64142055536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8591/2472/files/morasigojerer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/introduction_automata_theory_languages_computation_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2589/0469/files/mawokutoxakiwezagipek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6904/6935/files/usps_hold_mail_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/7862506017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/vopedagerew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2893/7880/files/mercury_outboard_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/53100370461.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_off000059ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59BA 5616 bytes
SHA-256: f2131616cda1195a9741211b49fc0bd835e5d096c8b33a0e540c395ef288bfbe
font_01_sfnt_off00006ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA1 10064 bytes
SHA-256: 58fe32427eee3957d2d4f1f0c5fb1c53419756239051929b0e269efd383eff38

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