Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd4bf6d30be1147…

MALICIOUS

PDF

39.6 KB Created: 2020-08-26 10:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 345b1c43ef65a3d22b99b7f9c113588e SHA-1: cb6933ba6d24d43a723ed67343b77b57b3b7ef31 SHA-256: 4cd4bf6d30be11472333c9cd6f67adaf531817d7d8fec941e876e6afd72ed164
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on ttraff.ru. This infrastructure is known for redirecting users to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is designed to lure users into clicking malicious links.

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=present+simple+past+simple+passive+v In PDF document text
    • http://bawam.shopblingcandyboutique.com/uploads/1/3/0/8/130813528/mubigiresoneruk.pdfIn PDF document text
    • http://files.amandaolsondpt.com/uploads/1/3/2/7/132740580/7507328.pdfIn PDF document text
    • http://jogadesot.benformisano.com/uploads/1/3/1/6/131637376/motekefagubogir-fubabev-nuwibimuzon-xanibizabogude.pdfIn PDF document text
    • http://tekuwu.richardmongiat.com/uploads/1/3/1/8/131871390/ac9c2f.pdfIn PDF document text
    • http://xinamoj.kansasnursingstudents.org/uploads/1/3/1/6/131636725/fesirir.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/1/0432/8115/4204/files/66477856756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2587/4600/files/wapukozalajexugagisexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/escala_cromatica_colores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6889/0782/files/94338241133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/42315617421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/pdf_to_image_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3640/7973/files/76650972999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/xinuleveduxilidokato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7233/1682/files/gospel_of_barnabas_free_download.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 5

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_off00005e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E37 5024 bytes
SHA-256: 354a27c085a5572eb7df69f2d4436953a0db8758d81c5d51454bed32946a214f
font_01_sfnt_off00006f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 10060 bytes
SHA-256: 0e8c170acd3af1a3923d0bb0fe9657fca0ef0feca582122053fadb0693351a9e

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