Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a0fa612add3e40…

MALICIOUS

PDF

51.1 KB Created: 2020-11-01 02:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 70fb41322db017c6bd55821e51c5a671 SHA-1: 1f0de11fbef2eb931c30aed81c0ca85bf16b20a7 SHA-256: 36a0fa612add3e4079d422d11ba5f01be9f40a34e5b7233ea520beec3b067cbb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/123?keyword=heated+mouse+pad+cocoon', is likely used to redirect the user to a malicious site for phishing or malware delivery. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external documents, suggesting an attempt to manipulate search engine results or distribute further content.

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/123?keyword=heated+mouse+pad+cocoon In PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/genusojofixax.pdfIn PDF document text
    • https://gafalevomunu.weebly.com/uploads/1/3/4/2/134235362/wegixe.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/gigise.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tudawufed/connecticut_department_of_natural_resources.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/44973095602.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/26386991125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c7c63fe-4804-4dda-8e01-a977ec65800e/anatomy_and_physiology_for_dummies_w.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/formato_para_certificado_medico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e124169-2874-4a0e-b2dd-2d6b44cf2913/niwiguf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1876/2440/files/ruridapowutabejaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3632/2203/files/assassins_creed_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/92684461121.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_off000087a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A1 5052 bytes
SHA-256: 08403578f8f431e43d6f30483c81ada16778835a257b77fc95a09c48029e25f2
font_01_sfnt_off000098bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BD 11340 bytes
SHA-256: 769ab1a37db8bc84948a4c8faf3da9ff14e2a072f5c7c4096363f0f81680f942

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