Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c096afb6126e83…

MALICIOUS

PDF

54.2 KB Created: 2020-08-08 08:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 07554e9503dcadb71921b009a74a525a SHA-1: e24aad2a2dd6d50380adf26907861412c9325058 SHA-256: 73c096afb6126e83467793f0d7365c1db58903e6d59aca7edd47a7c92c3ef2ab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text related to 'mental health definition pdf' and the wkhtmltopdf tool, suggesting a lure to disguise malicious links. The primary malicious IOC is the redirector URL, which likely leads to further stages of infection.

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=mental+health+definition+pdf In PDF document text
    • http://files.ameenayoub.com/uploads/1/3/0/8/130813558/delizadefotewi-nudojefut.pdfIn PDF document text
    • http://files.hecmaconference.org/uploads/1/3/1/4/131438313/naxaxuburuterop-motuje.pdfIn PDF document text
    • http://files.singingdaniel.com/uploads/1/3/0/8/130873851/39c74.pdfIn PDF document text
    • http://files.restorenorthampton.org.uk/uploads/1/3/2/3/132302894/61359252c4.pdfIn PDF document text
    • http://files.maahomestead.com/uploads/1/3/2/8/132815791/suroz-punofubalu-gibinon.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/1/0433/9784/1054/files/juzored.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/sepotujizevab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/jotipaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/sqlite3_create_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/tatugemovapod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/9392/2726/files/best_app_to_annotate_on_ipad_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/pixibolanaxejuwuxigusobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/69305393884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/35604705670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/suikoden_2_strategy_guide.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
🗂 Part of campaign: hecmaconference.org 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8985 4648 bytes
SHA-256: 7617a75486ffc2646499acdd2db8f49b6d70e183bc714697b7a80367cf294df9
font_01_sfnt_off0000994d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994D 10616 bytes
SHA-256: b2a2f3b8baf9c9e63cf778b7b7769a1fd849e9090a1ba2a48973eb3b65e5dfcd
font_02_sfnt_off0000bdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAD 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e