Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a5830f39976e23…

MALICIOUS

PDF

73.4 KB Created: 2020-10-31 08:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5fe07631a996d4663022dcda20a2b727 SHA-1: 1b26900dbc4506bd7a162e06a05781692140a812 SHA-256: 89a5830f39976e23b3841fe0633eef0d42a675df47bb1350090f78227a731d5a
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for a game guide. This URL is likely used to redirect users to malicious or phishing content. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the nature of the redirector and the ML classification indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/pify?keyword=wotlk+mage+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f86ffbb3680c.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/e380510d72b73.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/finuvavubabu_jiwigo_buwun_watik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f99bca7c8b72.pdfIn PDF document text
    • https://kexoxuneve.weebly.com/uploads/1/3/4/5/134501441/xejib.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/xekena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f8b60ece9bf0.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/pebudo_tataz_busezefalikir.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/1/0495/4587/1512/files/livitesu.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/vupokutogukimufutegokof.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/carbohydrate_metabolism_exam_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a70bfd35-c5ee-4be4-97f0-8c17b8244519/rebufijegubu.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/craft_essence_of_ravage_health_eso.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/abstract_reasoning_test_for_college_entrance_exam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/47022216290.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DD 4948 bytes
SHA-256: d6abe6e85a3632c2433c99590f744e2a66da83ac98143c5eace313a7bc632c69
font_01_sfnt_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 16320 bytes
SHA-256: 856342e187971d56050a781d1e0a5e6b85a69939beebf7f6e725dd98e18ff412

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