Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b61ff246e66d36…

MALICIOUS

PDF

40.9 KB Created: 2020-11-02 16:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 032563948d1b0819c04e7848cdffab83 SHA-1: ed0628597371bb6bf82290552e21d01649f2d01f SHA-256: f7b61ff246e66d36a69667efa7bb64e59c931f407894f3674ac3ef7217285c90
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, 'https://gettraff.ru/aws?keyword=how+to+grow+wild+garlic+in+pot', is identified as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous links pointing to external PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

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://gettraff.ru/aws?keyword=how+to+grow+wild+garlic+in+pot In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bupijila/74708508535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1268/5461/files/akon_right_now_lyrics_ringtone_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/online_converter_to_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/michael_oakeshott_rationalism_in_politics.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/bexupuwufexitagebumebedo.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/keto_meals.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/28519191005.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/shopping_vocabulary_advanced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70dee8df-0213-420b-b2bd-5b46cf9e2bbb/xuxusezuzuxefadomakiwetur.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/lovugodaresogofewubafeber.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/sekebusutulomosaxot.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/sunbeam_ice_cream_maker_recipes_vanilla.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/arquitectura_moderna_en_latinoamerica.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_off00006448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6448 5116 bytes
SHA-256: 610c89e4476b5946acfe7c4cd3dca6f9961942c2e1a3aacd01080a774908aa9a
font_01_sfnt_off000075d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D2 9576 bytes
SHA-256: bf61b940b6e959247e10047183e44cf07ceb76d979e98b0fe305c448ee2ab916

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