Malicious PDF — malware analysis report

Static analysis result for SHA-256 390afefdf192983f…

MALICIOUS

PDF

33.1 KB Created: 2020-08-20 06:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86b614650492853676c91aa3ce5594ae SHA-1: ea00670bfc79e74012a6542a6a5ee284b079f259 SHA-256: 390afefdf192983f42ee1de2a1407ed68326f3bd1930d1ffbd520301d6d00b4a
194 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common technique for delivering malicious payloads. The document body and embedded links suggest a lure related to educational material, specifically a 'dna structure worksheet'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to attract search engine traffic and potentially mask malicious activity. The primary malicious IOC is the redirector URL.

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=dna+structure+worksheet+high+school In PDF document text
    • http://fibix.chloe-bee.com/uploads/1/3/1/4/131453645/dumigogakofu_jelod_febisitas.pdfIn PDF document text
    • http://files.edmondmoms.org/uploads/1/3/2/7/132740756/7345960.pdfIn PDF document text
    • http://files.painterly.shop/uploads/1/3/1/4/131452982/4dada2bdb9c7a8.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/1/0434/1766/5701/files/rekosokeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/mesagagabepuxavoferulozis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4038/8758/files/dokuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7035/7653/files/an_introduction_to_cardiovascular_physiology_levick_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3471/4017/files/6465633086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1424/0931/files/factores_bioticos_y_abioticos_de_un_ecosistema_acuatico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/kotiginikoronuranoduted.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/bojomazewopebiluvawolipem.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
🗂 Part of campaign: chloe-bee.com 3 samples

Related samples 1

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_off00004496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4496 5216 bytes
SHA-256: cb8b537190894a7377daba7321c0da6ff001feda6d27e0dd7a6851da29ded332
font_01_sfnt_off00005662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5662 9828 bytes
SHA-256: 11cca99e9a8f2f5bfce0887e1b72d50815e3749989f613ae1a087ceb8e4e6136

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