Malicious PDF — malware analysis report

Static analysis result for SHA-256 73af2bda57c41b1e…

MALICIOUS

PDF

44.9 KB Created: 2020-07-14 16:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75cdf42c933fae63461cfe8be55ba174 SHA-1: 698d42bd6c97d1fd7f1e430c416123a41633d659 SHA-256: 73af2bda57c41b1eb2a585b0e40ceb6337e0ec04489f78531cc1ab48b0cbcde4
194 Risk Score

Malware Insights

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

The PDF contains numerous links to SEO-optimized PDF files hosted on various domains, many of which redirect to a malicious URL. This indicates a link farm designed to distribute malicious content or conduct phishing. The ML classifier strongly supports the malicious nature of this PDF.

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=first+law+of+thermodynamics+for+open+system+pdf In PDF document text
    • http://files.premieredogs.com/uploads/1/3/1/8/131860938/linugulok_vapusiloganuk_tajile_petugomowaw.pdfIn PDF document text
    • http://files.aurorapanonica.com/uploads/1/3/1/8/131871980/laxesozodanukud.pdfIn PDF document text
    • http://files.grayhawkpto.com/uploads/1/3/1/4/131453332/df8206d.pdfIn PDF document text
    • http://files.paulsumich.co.nz/uploads/1/3/1/4/131438758/powevozoza-dajojezizamu-rojukomutigu.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/1/0428/9835/8432/files/7868051279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/midegatiwodamowajojolepol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81143567733.pdfIn PDF document text
    • https://nubamozi.files.wordpress.com/2020/07/63102682398.pdfIn PDF document text
    • https://mazokotafon.files.wordpress.com/2020/07/xiwagilixiveba.pdfIn PDF document text
    • https://nalevadasedo.files.wordpress.com/2020/07/ruwubenaliribusoxaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/19329979045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/panabuzupateserisux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4896/8090/files/fenefonixopupawomid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xifadek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/64317892553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/9696228561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/xotemamisezafenon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93616534700.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7027 5332 bytes
SHA-256: d62b1e602ddc4db3e6fd7194cb53407fcc9ded9dc9e5cf6911f8801bd189b6d2
font_01_sfnt_off00008235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8235 10796 bytes
SHA-256: 29e591d110da1234f13fcd8c362fadc39d1ba3dbae3b9573fe2da21aa34991ea

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