Malicious PDF — malware analysis report

Static analysis result for SHA-256 b623cfd074fb7a86…

MALICIOUS

PDF

40.6 KB Created: 2020-08-22 10:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bfba4fed6453475d178b589faeaf9dbf SHA-1: fd426069be47f114667ef3551b9c69c1388731a7 SHA-256: b623cfd074fb7a86a941b65698015be1562c8a48601c921f2f30856bac2ec8d9
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 Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.cc/pify?keyword=chromogenic+substrate+coliform+test In PDF document text
    • http://dedurevuv.nekimastrategies.com/uploads/1/3/2/6/132695569/6d50e2684f897e0.pdfIn PDF document text
    • http://files.bethmaries.com/uploads/1/3/2/6/132682585/todanubo.pdfIn PDF document text
    • http://files.cherokeerosehandcraftedsoaps.com/uploads/1/3/0/8/130814200/faa3af8daaf.pdfIn PDF document text
    • http://xozijigos.thesacredyes.com/uploads/1/3/1/0/131070420/kuseki_wujeputawit_kekupivexikax.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/1/0431/4864/0418/files/kowujur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/frank_s_hospital_workshop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/12408402831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8093/1742/files/zumamiwogibovavaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/perojelakekefobogixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/43374485916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/95632558675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0100/2664/files/22977550365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/discord_dating_servers_under_18.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/dapowulokuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2144/2977/files/53814193128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/lupijiginuxijav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4071/files/nolokuvexerokunikojupe.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_off000060c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C4 5340 bytes
SHA-256: abb526d9999a1142408ca223762efb847f8b3026339decbd3cebebaf017f8779
font_01_sfnt_off000072cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 10092 bytes
SHA-256: 6a5d59cc109343aba2dce3111fc0851a5598f127d660a13f2be4928d34b653bc

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