Malicious PDF — malware analysis report

Static analysis result for SHA-256 862626bd939ac0de…

MALICIOUS

PDF

43.7 KB Created: 2020-08-18 14:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 865a0537686628cb5c20569fb25ba255 SHA-1: d681072a7bc3de2862a848d4d2f7be7821cd4471 SHA-256: 862626bd939ac0deb819da500dfc07bcf5194c14f8b340197d88a29572442ba1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector infrastructure identified as malicious. The document body and embedded links suggest a lure to download further content, likely malicious, under the guise of academic material. The ML classifier strongly indicates maliciousness, and the presence of redirector links supports a phishing or malware distribution attack pattern.

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=biology+project+on+human+heart+pdf In PDF document text
    • http://tifaw.upperskagitlibraryfoundation.org/uploads/1/3/1/4/131482976/1235173.pdfIn PDF document text
    • http://poxinib.wileychemistry.com/uploads/1/3/0/8/130814328/575dc.pdfIn PDF document text
    • http://files.fhwellness-ca.com/uploads/1/3/1/4/131453214/suxazivujugi.pdfIn PDF document text
    • http://files.rosesrags.net/uploads/1/3/1/4/131407194/sekidefuwip.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/1/0433/9014/0581/files/38902325907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5838/7349/files/bible_nkjv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/recette_de_cuisine_algrienne_ramadan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/44438280107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/15778938906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/debusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1278/7109/files/electronic_devices_and_circuits_by_jb_gupta_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7792/6040/files/xapetelanomodase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1158/files/baned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/70929492999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/oxford_bookworms_library_stage_2_the_jungle_book.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 6

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_off00006053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6053 5500 bytes
SHA-256: b765dd2f7079862c85d6bbc3a97638a5d4097b859a808b713f67ec12850a13a7
font_01_sfnt_off000072df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DF 9680 bytes
SHA-256: fb9e1678ae77b904b7eb0bcfb81df1f78c45c0adb62c53ee392840c91dae0763
font_02_sfnt_off000093fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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