Malicious PDF — malware analysis report

Static analysis result for SHA-256 63aab769edcfb318…

MALICIOUS

PDF

54.5 KB Created: 2020-10-30 17:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b1ba394b1e0a00cd811281720b94fa7e SHA-1: 35c41fc23443093c34b0d4e92de6b6cf38136dd1 SHA-256: 63aab769edcfb318c16cbf5f9ffb23f3756118d2be2d19ff3c385234ee37ee13
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly supports the malicious verdict.

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/strik?keyword=education+is+not+the+filling+of+a+pail+but+the+lighting+of+a+fire+plutarch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5f8d7452d6746.pdfIn PDF document text
    • https://julefezi.weebly.com/uploads/1/3/4/1/134131413/telopebifepesibixewi.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/aa20e8cf.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/1/0498/0002/0130/files/liruzewumibabavaribami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def6830b-744a-4474-9664-fe41a9d5dcd3/gigavonesivufumisebut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9227/3061/files/85146894705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa840ca0-ba9e-44b2-9915-ba8368faeaef/torezagikumenitiririwip.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/crossfit_workout_log_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/3420/3050/files/x_hunter_weaknesses.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/zavikolenetogapusedug.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/2754699584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9359/7601/files/bebigujinifumobiv.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/ryobi_shop_vac_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4295/3118/files/modify_headers_chrome_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000764f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764F 8784 bytes
SHA-256: 96a5feecff8cfc074e7c6c29969c3bb311268595cb25b640c7e87d4c0a17a0f7
font_01_sfnt_off0000938e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x938E 5512 bytes
SHA-256: 6a50d52417886e49f3e17013f0fbbd12f52444c15f154d313da7b6740fee272c
font_02_sfnt_off0000a648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA648 11028 bytes
SHA-256: 71440257bb02dc382a81ae08ed19f2f0a6bed69d04cbbc7eb872934bb937fd7c

Open this report in the interactive analyzer, or submit your own file for analysis.