Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b20235360725f81…

MALICIOUS

PDF

50.5 KB Created: 2020-08-05 23:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b761715d6bbb737b3395486928d8b008 SHA-1: 82ecf48dd7b5f2a2fb65af3a948666a5e24d82f6 SHA-256: 5b20235360725f817f7ddbdd75b28b4496203fc144d2db80143dde29d5d8ecec
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 URL, suggesting a link farm designed to distribute malicious content. The document body, though obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=november+2020+calendar+template+pdf', which is also flagged as a malicious redirector. The presence of multiple embedded links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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=november+2020+calendar+template+pdf In PDF document text
    • http://files.northcarolinapovertycoalition.org/uploads/1/3/0/7/130776131/rakodu.pdfIn PDF document text
    • http://files.juliemaeseele.com/uploads/1/3/1/3/131384335/davakiza.pdfIn PDF document text
    • http://jetujefum.yoonoptometry.com/uploads/1/3/1/4/131453329/sidudanemuvu-boletunotapimud-xidide-moxozak.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/1/0431/1970/6269/files/93845437347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/togoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/kexelafofupobajen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/59342603483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/losasegepobur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/28038316589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0106/7166/files/3583702652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/beginners_guitar_lessons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/56133036079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/zebolurix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/66275391960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/63996081199.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 4

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_off00007b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B83 5568 bytes
SHA-256: c1062ef297de6d5a3b9ba549ceed75fa1759a48b43022725461239a0ac7da7bd
font_01_sfnt_off00008e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5D 15072 bytes
SHA-256: 41c9dc14dc0e1a8097c8ba6e858871c1dd6a7e3783f0641d7d4a628f173a16c9

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