Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf57872584f0dacb…

MALICIOUS

PDF

44.9 KB Created: 2020-08-24 04:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ad688b62b72fe275c54a320ec809d0b SHA-1: dadf67ed0e71e07fdca9cf7ece940839e96951bd SHA-256: bf57872584f0dacba66ffa3c8b275b7ebd6f654a3ba8655d0163cf5688258f3a
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'word 2010 calendar template 2018' lure. This combination indicates a likely phishing or malware distribution attempt, leveraging a link farm to obscure the ultimate malicious destination.

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=word+2010+calendar+template+2018 In PDF document text
    • http://files.arlingtonreformedchurch.org/uploads/1/3/1/4/131453944/karalafu.pdfIn PDF document text
    • http://jesusaken.striveforhealthy.com/uploads/1/3/0/8/130874422/gewib_moxopisixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/performance_appraisal_answers_for_managers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/javeludofesowurodujugatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4704/9621/files/byrsonima_crassifolia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4567/5420/files/barron_s_sat_biology_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/rurenumagofowikepejuroli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/64116303903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5678/9664/files/14020082493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/zebutasiwotuzupopavare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/16745299131.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 3

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_off000063f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F2 5316 bytes
SHA-256: ca8195e0c0122ac2673e881f01aa48004723cdbb0e9539584512f1d289316483
font_01_sfnt_off000075ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EA 10284 bytes
SHA-256: 4bd41fd4452c6f5533d3291225825160d3c9c28da19b2a3dc9794c8b3f7977a3
font_02_sfnt_off00009922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9922 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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