Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca3b3270a87baef…

MALICIOUS

PDF

44.7 KB Created: 2020-10-22 19:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 95a8496c6a1a952b2d30470aedfff049 SHA-1: 26e5ffb4ac0f96d16ba0374bc37c4e82b514917d SHA-256: cca3b3270a87baefba2d9a8dece02522aabce627c31edea6d52974c15d2f2101
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The primary malicious URL identified is 'https://ggtraff.ru/123?keyword=mevlanan%25C4%25B1n+%25C3%25B6zl%25C3%25BC+s%25C3%25B6zleri+pdf'. This behavior is indicative of a link farm designed to distribute malicious content or facilitate phishing attacks. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/123?keyword=mevlanan%25C4%25B1n+%25C3%25B6zl%25C3%25BC+s%25C3%25B6zleri+pdf In PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/4442999.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/9327600.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/4136793.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/1003721.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/fotamesu-jorunonule-xitewe.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/1/0431/9209/0788/files/little_caesars_erie_pa_grandview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/bare_bones_bowling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6728/8989/files/honda_hs720_snow_blower_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8526/4575/files/coreldraw_x6_software_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/92809000385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3060/8573/files/nifegaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7616/9109/files/21832356209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5801/0544/files/name_of_human_body_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/67388618329.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/cancelli_in_ferro_battuto_catalogo.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/65720168318.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/37660789197.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/adjectives_for_describing_personality.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/97350832051.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/sanjay_agarwal_costing_book_ca_final.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4128940-e780-4d64-aad2-1bc667073d28/nozumowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a857e8-209b-477e-8c3c-364c9f95b77a/rasogofuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65be981a-a442-4454-894e-949ec88a97b5/97317483287.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_off00006d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2D 5440 bytes
SHA-256: 7cc98a0cd5fad6402e0f30cf431b90cf9f93819255e00780edbf59f62df1e911
font_01_sfnt_off00007f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5D 11604 bytes
SHA-256: a6cde5c70c2a406e39d66765c1b7f31456ec48baa8d46e873ce73d01b92f249d

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