Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f09a0c921b07ef…

MALICIOUS

PDF

54.1 KB Created: 2020-10-27 09:12:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1727f580a2cf99dad8c1493230054df4 SHA-1: 928e10aace81ba576105f61890903c5df0824719 SHA-256: 50f09a0c921b07efa08cfbd3deb7e126774ca3bd773d9ec6d07e6cccfea3d784
94 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 pointing to 'https://gettraff.ru/strik?keyword=as+seen+on+tv+air+conditioner'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware download campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/strik?keyword=as+seen+on+tv+air+conditioner In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f8ef468253a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8777b22164e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5f8af46554acb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f8df39fe4423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f8ae81c5204c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f931c1bce04f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f887b7b73bf1.pdfIn PDF document text
    • https://laxigozi.weebly.com/uploads/1/3/4/3/134361341/zenizumegoxekuna.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/kamer_dewonudokud.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/1/0503/8650/1806/files/gulisumama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4367/1194/files/rigumagiwaridaroxinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3183/7344/files/make_fillable_in_acrobat_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/3815/2101/files/58184152599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7597/4821/files/mewodenifiguz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8196/6763/files/bsa_comet_evo_silentium_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2946/8600/files/42294502846.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/3rd_grade_math_assessment_test.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/53608869393.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/mapa_mundi_mudo.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/jolaninewabisafixonetolir.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_off000095a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95A6 4952 bytes
SHA-256: acb6f12d47ced4ad66a0f168b2c1c7cc52e11ef55a389b1c498dcf521f4deb34
font_01_sfnt_off0000a688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA688 10696 bytes
SHA-256: e11d6b7633ecb8503f6fa4056d61bdeb1adfb65e687ba1fa897b0a3036d4e001

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