Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1bf520c614141a…

MALICIOUS

PDF

40.9 KB Created: 2020-08-15 07:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a00a7093e3c145fb88ff0d2d4f9870be SHA-1: af588b06de445829f323bdd9b72c128a90cd6d44 SHA-256: 9c1bf520c614141ac15f302a77500f97a072f21f84e8f0ce28fb4e8c44473018
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'quadratic equation problems and solutions pdf' and a URL that appears to be a malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely leading to further malware downloads or phishing attempts.

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=quadratic+equation+problems+and+solutions+pdf In PDF document text
    • http://files.wakelandcolorguard.org/uploads/1/3/1/4/131438056/digije_kenaxeladeruf_depipevibevifi.pdfIn PDF document text
    • http://bisonip.papyrology.org/uploads/1/3/0/8/130874493/8daceaf3.pdfIn PDF document text
    • http://files.zenbeautyspa.com.au/uploads/1/3/0/7/130740502/begizitepalo-wusot.pdfIn PDF document text
    • http://lajejik.carywoodcarving.com/uploads/1/3/1/3/131398591/xavejedebilufo.pdfIn PDF document text
    • http://mevegexax.mensshedclydach.co.uk/uploads/1/3/0/8/130814328/79cbc58.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/1/0433/2018/0894/files/46098250983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/52567390019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/848144856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/72807201909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/97455548690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/86558794358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/brain_edema_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4243/1395/files/37548258357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32852202686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9867/6131/files/neoliberalismo_y_educacion_en_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7439/4014/files/sybex_cissp_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7E 5628 bytes
SHA-256: 6df982ee47b4e3fef5d3ffb0927e71939cfe6fba1e2299b2e86f7d6d9f7f0a82
font_01_sfnt_off00007178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7178 10908 bytes
SHA-256: 99808b22d7de3600b1e284927b5e5ec0904750c2f541f3c14a08ccc9e9e8f9c1

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