Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c57ec99d1ece24c…

MALICIOUS

PDF

40.6 KB Created: 2020-08-05 01:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a9aba90be6a77c9e7dc9c0b8954b7500 SHA-1: 9ef1e4fc0e68851afa4bdeb1f8facf5ddece85a2 SHA-256: 1c57ec99d1ece24c9cb36d4582393e547c624ee765854bcc705d0d6097db9d6f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a malicious redirector link disguised as a school medical certificate. This link leads to a link farm hosted on Shopify, which in turn points to numerous other PDF files. The primary intent appears to be to drive traffic to malicious infrastructure and potentially distribute further malware or engage in phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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.com/pify?keyword=certificado+medico+escolar+sep+2020+pdf In PDF document text
    • http://files.toramartialarts.com/uploads/1/3/0/8/130874067/7470703.pdfIn PDF document text
    • http://files.aemiliawidodo.com/uploads/1/3/0/8/130874201/janidawip.pdfIn PDF document text
    • http://files.galtfarmsgenetics.com/uploads/1/3/1/4/131453256/bomepibos.pdfIn PDF document text
    • http://ratewix.projectxlacrosse.com/uploads/1/3/1/0/131070152/5272c1bb964.pdfIn PDF document text
    • http://files.midwestalliancesoccer.com/uploads/1/3/0/7/130739740/wogapaf-megapemizevo-pefedakaxokak-zavunamut.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/1/0432/0336/2973/files/zugebuledigenexofez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/ritaguboxubilokanoxoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/bozonikalapubinapot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1484/7655/files/hernia_inguinal_e_hidrocele_en_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/croix_kabbalistique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8752/8103/files/teachers_curriculum_institute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5135/0166/files/kukadobabavapugalib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/teen_marvel_lili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1692/6870/files/febokudoginere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/zubub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/43413473786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/nawapogujefebotux.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 8

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_off00005f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0D 5480 bytes
SHA-256: 3f612fddcfe970eaecb455ef914a9baacd36d22a01a8f207e77650c3bc2fc448
font_01_sfnt_off00007198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 11044 bytes
SHA-256: 43204ebc130e9ab4cb46db78fd1a950bc25ae38b75ea0d4dc7b062a9784bd46c

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