Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c44c9cf437af21…

MALICIOUS

PDF

45.0 KB Created: 2020-08-14 15:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6910f68921f6735429bcd42e4c7a4736 SHA-1: 3846b4fde8125c7897b214e91be519598670c00f SHA-256: f8c44c9cf437af219f962f04e1f67c99595f2674c7e4e067d0a2befce337e9c2
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=best+football+games++apk In PDF document text
    • http://jerodirad.craighawkinsart.com/uploads/1/3/0/9/130968973/goxofis.pdfIn PDF document text
    • http://files.canterburynuts.com/uploads/1/3/0/8/130874213/zalepu_xumamasepo_jenapolij_nelawovude.pdfIn PDF document text
    • http://nefamid.bosombuddiesbenefit.com/uploads/1/3/2/3/132303338/978492.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/77934701795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8541/1990/files/86063755400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/seruputokujawoxubimed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/54270043773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/surah_alif_laam_meem_sajdah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8372/5990/files/noaa_weather_pocatello.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/aprender_coreano_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3513/1046/files/xiwaxuxijokuranujazevediw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/41965108133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/windows_7_enterprise_license_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6354/1913/files/complete_blood_count_report_template.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 5012 bytes
SHA-256: 215176f137408b84a0d106eedbfe93e9a213144d76f26d9ec130f1af20c2730c
font_01_sfnt_off0000770a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770A 10128 bytes
SHA-256: 70bdef2d903de0aa8fa6207c442b5e0755d3292ca6897b9318ae9b1505a57875
font_02_sfnt_off00009972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9972 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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