Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d5be1baedbf06a…

MALICIOUS

PDF

49.2 KB Created: 2020-08-26 19:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e9e77cf2cb39d52964fdebf32e6374b SHA-1: cc88044e8184c5bab213ca64142c65f555a43083 SHA-256: 78d5be1baedbf06a78c60c025c2fdc23fe1c0dedf97e5f4d2778afd62d2c3f18
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating an attempt to lead users to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. The embedded URL and the PDF_SEO_LINK_FARM heuristic suggest a phishing or scam attempt using a lure for free downloads.

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.cc/pify?keyword=poynter+institute+bias In PDF document text
    • http://files.eatmysugar.com/uploads/1/3/2/6/132695213/61c7d.pdfIn PDF document text
    • http://files.nunavutlearning.com/uploads/1/3/1/4/131406592/8ce8010a9.pdfIn PDF document text
    • http://files.masjid-al-rasool.com/uploads/1/3/2/6/132682820/jukasinuludamu.pdfIn PDF document text
    • http://sujid.gotchadesigns18.com/uploads/1/3/1/4/131483492/7491665.pdfIn PDF document text
    • http://files.stonerstakeover.com/uploads/1/3/1/3/131379530/fafuko_jifatigefoxa_sarabopaj.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/1/0438/8644/4699/files/lexique_assurance_maladie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/shin-_chan_game_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/dedewiror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/75952437400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/23935351318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8419/9574/files/fogekifaseridetig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/fundamental_financial_accounting_concepts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/10474026754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/60194439212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/wujijitigazitibukake.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 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F5 4888 bytes
SHA-256: de565973c094a444928617957bcf3d5cb3785e4da2e2290d2e3bb3e9c4af5820
font_01_sfnt_off000093a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 10792 bytes
SHA-256: b07112b53df82ca42da58f900b1abee4d8908a5d3692dc56b022c147595db125

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