Malicious PDF — malware analysis report

Static analysis result for SHA-256 815279acec3fdc46…

MALICIOUS

PDF

44.0 KB Created: 2020-08-24 10:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2bd4358df336954ec88e8d5121eb4bd4 SHA-1: 5134a0c3dd8c594410c7cde002856b3c1beb5333 SHA-256: 815279acec3fdc46e9c72e2416cdc168074cb73567558c7711223f20e5014b58
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to a known malicious URL, disguised as interview preparation material. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that this document is part of a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicates 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.cc/pify?keyword=analytical+skills+interview+questions+and+answers+examples In PDF document text
    • http://waves.usaskpam.com/uploads/1/3/1/1/131164573/0a439d119ee75.pdfIn PDF document text
    • http://files.gracetonchurchofchrist.org/uploads/1/3/1/6/131606128/vekazaloxafamo-gozerinax-zimubisadezixij-zebuz.pdfIn PDF document text
    • http://jamef.quantrylaneart.co.uk/uploads/1/3/2/6/132681862/a2b2f88.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/1/0436/0149/4178/files/guwelediraxurazaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8089/2057/files/mapamundi_politico_para_imprimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/39812574943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/sujabideluxewupujemesafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/7382006467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/63581354458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/29311285760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/rofuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7678/0181/files/88545687114.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 1

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_off00006c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8C 5720 bytes
SHA-256: 15986ee4618abf25207f9d3d65bf3cf4029a6139feda50efa12590dc619cd60c
font_01_sfnt_off00008004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8004 10212 bytes
SHA-256: b6658d83b7e4241b298779ddfc443be624ef8e9ede7a6fd3851e1e107cf19c46

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