Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c21680a78809a3…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 14:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c3465f47bf3983b76f3a82534240ee95 SHA-1: 69c22922f06f1537f76087d6319dab0bc95a1cc4 SHA-256: 53c21680a78809a3229a5f939752663c105ebedcc9c114191d9b5d83391b3e57
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or malware distribution attempt. The document body text, though garbled, contains keywords like 'Ryanair app windows' and the malicious URL, suggesting a lure to trick users into clicking. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' directly points to the suspicious URL, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, common in spam or phishing campaigns.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=ryanair+app++windows In PDF document text
    • http://files.dragomirdesignbuild.com/uploads/1/3/1/4/131438829/8635245.pdfIn PDF document text
    • http://files.columbiacounty911.com/uploads/1/3/2/7/132741555/66186.pdfIn PDF document text
    • http://files.entacobowlsclub.com/uploads/1/3/2/3/132303077/1534701.pdfIn PDF document text
    • http://jegubi.deepinspired.com/uploads/1/3/2/6/132681382/8388108.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/1/0432/4986/0765/files/caste_list_in_gujarat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/punctuation_rules_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/84066102572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/96083315710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/63656994935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1859/8053/files/cfa_level_1_time_value_of_money_practice_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/yahoo_mail_for_iphone_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/16482071577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9408/1687/files/vajobefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4361/7959/files/51426529934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/wuzorakogakoxazakawore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/88223853309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8939/9712/files/how_to_edit_a_file_for_free.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: entacobowlsclub.com 4 samples

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_off00006998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6998 4712 bytes
SHA-256: 5bdcf7b4c892fb4753151271d92606507b1df9397691ac0e7b1f59b69766b860
font_01_sfnt_off000079a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A4 10780 bytes
SHA-256: 7589d948f35f6f52065494feffd893685a0fe068754cf68f22639fa0b4c07842
font_02_sfnt_off00009e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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