Malicious PDF — malware analysis report

Static analysis result for SHA-256 9536403222d52772…

MALICIOUS

PDF

62.4 KB Created: 2020-10-25 07:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1ab020c678d1b934cc539420ac0e2ba9 SHA-1: d7fbacfff90970379c072f41dc2a06d1128d5c9b SHA-256: 9536403222d52772c47674bcbda3f796ffad587f0155890a4926ba9edf90c184
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=best+proxy+vpn+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5f9500bf4f9ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8764eb2afb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f88c5bb9769f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_5f94ce9e77f93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5f9382cd63a88.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/1/0492/4171/8950/files/rajasthan_police_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1558/5448/files/33753571028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2159/7333/files/konto_kndigen_vorlage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4366/7616/files/17022209301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/sticky_notes_app_for_android_phones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0433/7565/files/last_dragon_chronicles_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1337/6680/files/36266153062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7621/5473/files/61818713909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7482/5621/files/xojorekizodajumotamofaje.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/tafupoxad.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/binomial_distribution_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/bozuwum.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/zeguzefepukozosefurofek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041a2298-a920-4967-a9a1-9a70417e9b1d/biographie_cheikh_ahmadou_bamba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8cd603-208b-4a71-826a-0200981fecc2/6500891261.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D10 5200 bytes
SHA-256: 6a1ca3658d1704f3dbf10318bfd2398647c84703e6d4948858cb932e866cf0fa
font_01_sfnt_off0000aede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDE 11908 bytes
SHA-256: 2eb767d1ca9ab74b476c10b013750ada71ecd7da01204f5eb5ef47f895b89d99
font_02_sfnt_off0000d6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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