Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15cc4c9c41234ed…

MALICIOUS

PDF

46.6 KB Created: 2020-09-18 10:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5f2c57cd9e16edf62f8a761d98b1cb6 SHA-1: ae19d34ab950c1fb4564b28cf16e689727111c55 SHA-256: b15cc4c9c41234ed8d8650cf0bd929159afde74f1eba3479e1fbb5360d815cb3
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that promises a 'clash royale hack apk'. The document body also contains this URL, reinforcing the lure. The presence of a PDF link farm heuristic further indicates malicious intent, likely for SEO poisoning or distributing malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.me/wix?keyword=download+clash+royale+hack+apk+latest+version In PDF document text
    • http://migikozo.noanimalpoaching.org/uploads/1/3/0/7/130775990/jusirijufas.pdfIn PDF document text
    • http://zaral.ims-spi.com/uploads/1/3/2/6/132696056/2005150.pdfIn PDF document text
    • http://files.patrickbohanbooks.com/uploads/1/3/0/9/130969151/juwurudo_zanosufegaxul_vemagotigovu_witimewupavirer.pdfIn PDF document text
    • http://files.mcmurrycommunications.com/uploads/1/3/1/8/131872238/wotebowakefi_vifokogavomopij_wasomidanimavud.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/1/0430/2487/5674/files/git_readme_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/wutowefun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6742/4416/files/74457450305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7055/5047/files/91860644319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/rrb_allahabad_alp_admit_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/9409/9366/files/authoritarian_leadership_style_of_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3090/2946/files/beowulf_the_poem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0383/7592/files/42142427325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/zavojewawoferurozafub.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off000062e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E7 5480 bytes
SHA-256: 4c2c1509d53b48141c0247acaf7e9ced5e2bc9169a956b6cfe4ebd14942832d6
font_01_sfnt_off000075a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A6 9780 bytes
SHA-256: a940a1aa86c00beadd916df3071f906fee30fbb2153c81b980fd03e7ad3b0808
font_02_sfnt_off00009771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9771 16136 bytes
SHA-256: 7a8d8a38d607c9bdd80b9913bc08d848e6f19ee61167c2c7551fc905f808dd7c

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