Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1af8a19715384a…

MALICIOUS

PDF

42.6 KB Created: 2020-08-03 16:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f84d2a0850cb67fe2a4bfb519c8bca52 SHA-1: b489afbebf585cf09a914c97459b2cd231dd18bb SHA-256: 1b1af8a19715384a13009b42a99b419d74ff38f7d822b4a5342dc954d7f8fdf7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, many pointing to Shopify domains, but one critical link redirects to known malicious infrastructure. The document body, though partially corrupted, contains text related to 'mckay building construction pdf free download' and the malicious redirector URL, suggesting a lure for users seeking this content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to 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=mckay+building+construction+pdf+free+download In PDF document text
    • http://files.estellessweetitchblankets.com/uploads/1/3/1/4/131409170/tixavaxanepuluxuvit.pdfIn PDF document text
    • http://files.breathewithlauren.com/uploads/1/3/1/6/131606745/20be857e628e0.pdfIn PDF document text
    • http://files.gotechsfl.com/uploads/1/3/1/1/131164414/nonevupefoxi.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/1/0437/1709/9675/files/6307823547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/27745501559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0583/6444/files/bikenusorimemadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/17893668987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/paxaniweselamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/mipuletemilijezoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/ligoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/42752594664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/digesaweboneva.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000549f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549F 5724 bytes
SHA-256: 1433bec951d24209d8e5c99c7d34e857706bddda51f60a8820ced93816785b0e
font_01_sfnt_off00006849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6849 2116 bytes
SHA-256: 33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
font_02_sfnt_off00007213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7213 13412 bytes
SHA-256: 658df55e62aa4d6d993a6174cfc8489ec7fac22a77ba2f10ccda16e677a576e1

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