Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87af28614e2b3ec…

MALICIOUS

PDF

45.0 KB Created: 2020-08-13 16:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dfca33e9bf2527050a85ac2c66810197 SHA-1: f235a865117f71f5a7ab8d60641c7223f2fbb142 SHA-256: f87af28614e2b3ecc4413422e32de03fe4108cec7a5db62f1fa429d48deadfe6
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains a link farm and a specific malicious redirector URL, suggesting a phishing or scam campaign. The document body, though heavily obfuscated, contains the text "Biozone year 11 pdf" and the malicious URL, reinforcing the lure. The presence of numerous external PDF links points to a link farm strategy to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=biozone+year+11+pdf In PDF document text
    • http://files.majordj247.com/uploads/1/3/2/7/132712185/wojare-mawidez.pdfIn PDF document text
    • http://files.mindfulprofits.com/uploads/1/3/1/4/131452804/rakapesokakute_zunuzufulusime_levogeb.pdfIn PDF document text
    • http://files.nathanielpicardbusky.com/uploads/1/3/0/8/130814043/jozize.pdfIn PDF document text
    • http://files.strikesforkidsseattle.com/uploads/1/3/1/0/131070849/sizapobuwep.pdfIn PDF document text
    • http://files.southernpridedesign.com/uploads/1/3/2/6/132681415/1539950.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/1/0430/8611/9079/files/punijepivolimogupelita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/91783511437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/fisiopatologia_de_la_cetosis_bovina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0382/7608/files/29893274659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/aroma_gelato_and_waffle_lounge_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/25993493669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/61809586650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/dijatebivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/89275908117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/map_of_europe_after_ww1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5266/8830/files/9963359900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/togafivamaguritawamileguv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0149/3142/files/algebra_1_exponents_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nimapudusakodinufuzexive.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_off00006f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F20 5080 bytes
SHA-256: ebca9084079679af3e01cf928f434fc2015babf17670a957f5cfbfaa8534b2d8
font_01_sfnt_off00008088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8088 11308 bytes
SHA-256: f160ed799c6e85c7b0f83bb696626e95a75a17806f1c2700cbefad67906cd332