Malicious PDF — malware analysis report

Static analysis result for SHA-256 72897e4a4bbf001b…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 14:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed6dae696f298224463be8863a27ef95 SHA-1: 7ad06d09f6a496d83da27a438dd13a6ea11edbb0 SHA-256: 72897e4a4bbf001b4f258dfa9ab50c432f66dc88c104f539debb82fe40bb5d32
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector link pointing to a known malicious infrastructure, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains URLs that are part of this link farm. The presence of numerous PDF links suggests an attempt to manipulate search engine results or distribute malicious content.

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=carcinoma+nasopharynx+pdf In PDF document text
    • http://buwazaruk.sgttommyskids.org/uploads/1/3/2/7/132741555/xezif.pdfIn PDF document text
    • http://gowefib.thorsonpto.org/uploads/1/3/2/6/132696067/9dc36ecc91.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/1/0446/0707/8564/files/headway_elementary_video_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/pasar_archivo_a_word_online_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/5673821039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1977/8723/files/55582596254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/kamugebobuvasir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3879/2085/files/what_is_a_meta_tag_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/21214198793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/18105564263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6172/9685/files/android_file_transfer_pc_bluetooth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3755/files/banufef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/komplikasi_pneumonia_pada_anak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6656/3487/files/basic_auditing_principles.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_off00006d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D51 5440 bytes
SHA-256: e7d492d45b737a72ad7b69f7548b87a7b1f0b08f7906eff201f906673a36dea9
font_01_sfnt_off00007fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA7 9876 bytes
SHA-256: f3d6f7c8bd2dbf9f2d76d37de050561bb3117edb762e1ed4703c73f401ee2844

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