Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1cb168d6a0c97f6…

MALICIOUS

PDF

41.8 KB Created: 2020-08-23 01:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81a514273e3a2f2ac480005d118a85f5 SHA-1: 6e95874aaca50c95559348157d17bb67454f1333 SHA-256: b1cb168d6a0c97f66d5e5f99b46bd58e41b6d6781ea5139d6bef01887bbfd1c9
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=ned+yoyo+tricks+sheet', is flagged as a malicious redirector. The document body contains the text 'Ned yoyo tricks sheet' and references wkhtmltopdf, suggesting a potential lure or content manipulation. The primary attack pattern involves directing users to potentially harmful external resources.

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=ned+yoyo+tricks+sheet In PDF document text
    • http://files.katiemanthey.com/uploads/1/3/1/6/131606256/6930696.pdfIn PDF document text
    • http://files.mrlucero.com/uploads/1/3/1/3/131382239/kizoted-sadovowanasumi-lefotap.pdfIn PDF document text
    • http://files.northchesterbaptist.com/uploads/1/3/0/7/130739616/zolinonuxazoza.pdfIn PDF document text
    • http://files.boundtogethercounseling.com/uploads/1/3/2/6/132681901/jolewaxizor-zadinonenifa.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/1/0431/1823/1709/files/66524146811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0034/0381/files/safidupirotufutewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/kitadudimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8201/5135/files/adoption_and_safe_families_act.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1152/1181/files/63328408264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/54859370896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/laxizig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0499/7271/files/6399895925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5333/5207/files/luzuxij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/tudujiwemasoxalos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4388/0093/files/gotawexaxokokitanuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/brother_sewing_machine_jx2517_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3717/5456/files/kent_county_jail_inmate_search.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 8

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_off00006605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 4920 bytes
SHA-256: 74a2a3f24d94031338f783c3c957bb3023a749eab37f22284bef838226068b43
font_01_sfnt_off000076c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C3 10328 bytes
SHA-256: 9c8587e6b66a3b583ac6eb39656e9949f3550ee98b60613e5bdebf5c8780d647

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