Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc24b0e38527547…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 18:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff074ba1fcf6ccabdc5e9f12f77c022a SHA-1: b09642beeb4c629fb74f99c9684cc988d2a51e02 SHA-256: dbc24b0e38527547ade53b0940d40563c60333fb01912cc2c7bf0088a6841696
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to create an SEO link farm, with a primary redirector URL pointing to a lure for 'ielts academic writing paper pdf'. This pattern is indicative of phishing or malware distribution disguised as a free download. The ML classifier strongly supports the malicious verdict.

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=ielts+academic+writing+paper+pdf In PDF document text
    • http://files.crimsoncounseling.org/uploads/1/3/0/7/130740141/degeg.pdfIn PDF document text
    • http://files.cbcorlando.com/uploads/1/3/1/4/131407164/dba28d114f83af.pdfIn PDF document text
    • http://files.roadswell.com/uploads/1/3/1/3/131398292/ponalemega-dofowabojaworo-garanebil.pdfIn PDF document text
    • http://files.shoplashmayhem.com/uploads/1/3/1/3/131398322/bimozepatuwodidok.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/1/0435/4146/3204/files/schma_rgional_d_amnagement_du_territoire_maroc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/mount_usb_drive_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7613/2774/files/azure_data_factory_v2_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/93879804601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/nitoladifarebodemoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9101/7374/files/37457956522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/43603515604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/rejukalifujosukorivele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/34457283804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/58859981852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/wiluwurige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/65683922856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/rifuwipudazemavoler.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 6

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_off000065c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C2 5504 bytes
SHA-256: 06de1f84361781562e12948ead938f06ef1aaa1038cbacd66c641077492b90ed
font_01_sfnt_off00007879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7879 9860 bytes
SHA-256: c07224d42e3f84c3456c064fff8b444d0687a50bc86e3e98e37c372ced413ec9

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