Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd1c5c633c0f67a…

MALICIOUS

PDF

52.4 KB Created: 2020-08-17 07:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f9e717c676bbbe5a04ab6f3d2ae4f2d7 SHA-1: 428f3c5f0cd4d4a12a189b487e027ebd9e518563 SHA-256: 0cd1c5c633c0f67a6a97cd236f3ed113ae7315bd48494bcbc63f27c408243f29
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The embedded document body contains a URL pointing to a known malicious redirector, which likely serves as a lure for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=afl+finals+series+2019+format In PDF document text
    • http://beretelam.lindanguyenportfolio.com/uploads/1/3/0/8/130814310/rezizubevorud_fulasupobodeg_vefabujiw_vewejagudufe.pdfIn PDF document text
    • http://xokunema.hhsmusicboosters.com/uploads/1/3/0/9/130969335/xarinovebiku.pdfIn PDF document text
    • http://lerif.nishati-healer.org/uploads/1/3/2/6/132682883/gabokani_vevodik_tivapifonof.pdfIn PDF document text
    • http://files.english3000.org/uploads/1/3/1/6/131637374/bewajasasabozej_kiwuwukaduwelev_neruti_sazeve.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/1/0431/2160/6818/files/tojovibew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/human_body_systems_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/9438859350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/laruxaferajix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/vosezezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/45594431328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/c._m._s._e._d._medicine_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/30650893594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/97103500702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/hinario_caboclo_guerreiro_vo_corrente.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/action_verb_list.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_off000083ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CE 5384 bytes
SHA-256: f45dde05e40ab978e48ca80d751fc2ffe65e24079af34a4ea36515cbc1ebc34a
font_01_sfnt_off000095fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95FE 15156 bytes
SHA-256: 3e7c47e072c786ee1008e2971930af84f492ee8d3e9847496c70bbaf2e18a01b

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