Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d65960b1220dc6…

MALICIOUS

PDF

59.7 KB Created: 2020-10-14 21:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7b1fa4b4c15f8b44e44a59b2dd8a3183 SHA-1: ef7c2e9770e4ed2328f11ac4217f14d043e93ea7 SHA-256: b6d65960b1220dc6dfb05efaeb941678002ce74cffb6efab4329225101f695f3
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to disposable hosting, and one prominent link to 'ggtraff.ru' with a keyword suggesting a download lure. This indicates a link farm designed to redirect users to potentially malicious content, likely for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=download+badoo+apk+file In PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/sevove.pdfIn PDF document text
    • https://site-1036719.mozfiles.com/files/1036719/roboxudinosijib.pdfIn PDF document text
    • https://site-1039923.mozfiles.com/files/1039923/rabij.pdfIn PDF document text
    • https://site-1043976.mozfiles.com/files/1043976/30096500510.pdfIn PDF document text
    • https://site-1036934.mozfiles.com/files/1036934/manone.pdfIn PDF document text
    • https://site-1043047.mozfiles.com/files/1043047/tuvajabaxolirutiwipa.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/3870745.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/mezevoxinokimuwamibu.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/sijuzajavufote.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://site-1042604.mozfiles.com/files/1042604/14470883701.pdfIn PDF document text
    • https://site-1043237.mozfiles.com/files/1043237/95128992134.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/1/0504/3568/6560/files/sapaguruvema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/bokitugejipeguvupibonuzed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/lixuxiroral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9287/8527/files/zogozizodajusebilanekev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/19115271117.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7761 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00008756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8756 5056 bytes
SHA-256: 359c97a17963999c32d3c6f866e50a981f687b28e09615e219a40c70eef786c6
font_02_sfnt_off000098ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98AD 2940 bytes
SHA-256: c896a5a68c7c0f8041d3d2165e6e96e1ee3cfefb718af43f53cb6df747680987
font_03_sfnt_off0000a553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA553 10088 bytes
SHA-256: 8481f2aeaf8e2f95ec06cdb51f92b9ed31fd4042813585df1e71566a4771bd79
font_04_sfnt_off0000c800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC800 16504 bytes
SHA-256: 89c4e6f4d9664fbd621897cc1e92e7726fec29a324beeb7a4197236a5d1145db

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