Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcdb306e93e238c…

MALICIOUS

PDF

40.5 KB Created: 2020-07-24 16:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce2874139f2630195a48348e7265a47a SHA-1: 6f546d22d1738e7c903b838c52089c322854e3b2 SHA-256: fbcdb306e93e238cdd8bcb893208aa479ebb987d5db375d56f175e87174d62d8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous links to external resources, many of which are hosted on what appears to be a link farm designed for SEO manipulation. One primary URL, https://ttraff.ru/pify?keyword=biblia+catolica+para+ni%25C3%25B1os+ilustrada+pdf, is identified as a malicious redirector. This suggests the document's purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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=biblia+catolica+para+ni%25C3%25B1os+ilustrada+pdf In PDF document text
    • http://files.redangelsnetballclub.com/uploads/1/3/0/7/130740496/4442546.pdfIn PDF document text
    • http://files.rami-khushaba.com/uploads/1/3/1/4/131452735/rexafolawobeti.pdfIn PDF document text
    • http://files.usedlicense.net/uploads/1/3/1/8/131857650/68f440200a34.pdfIn PDF document text
    • http://files.swornoathbrand.com/uploads/1/3/0/9/130969809/2405583.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/1/0433/2313/0009/files/60300008526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/1229561991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/19225251410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/8318983330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/98312557730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/kegiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/35398235252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/86376204044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5192/5155/files/52713601447.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_off00005da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA5 5316 bytes
SHA-256: 33d74f6a4795d29d8ec98912191911395a22da9b768d6f4a42681c08504f3257
font_01_sfnt_off00006f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F62 10808 bytes
SHA-256: 1bb83176f5a533aa5ef2b2d312442867de1c5a9c1fff28b7b3338fac921fd080

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