Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd614eea8dc1d66…

MALICIOUS

PDF

34.6 KB Created: 2020-10-01 09:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 11c17ebb70cab84e28972133c6d6835b SHA-1: e819f0cdbeb9708520c5f8b15b7bc2aea3e5a924 SHA-256: 8cd614eea8dc1d66c942d1f807e94b96f81f757e46b21a3a827320e191e8540c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded URLs. One of these URLs, https://cctraff.ru/strik?keyword=bikhre+moti+hindi+pdf, is identified as a malicious redirector. The document appears to be designed to lure users into clicking these links, potentially leading to further malicious content or exploitation.

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://cctraff.ru/strik?keyword=bikhre+moti+hindi+pdf In PDF document text
    • http://files.andysdance.com/uploads/1/3/1/4/131453094/5523214.pdfIn PDF document text
    • http://files.calvarymennonitechurch.org/uploads/1/3/1/3/131380504/577732.pdfIn PDF document text
    • http://files.marinofernandes.com/uploads/1/3/0/8/130874615/7b856d5b0e7159.pdfIn PDF document text
    • https://site-1039152.mozfiles.com/files/1039152/zefebixenotuvototefar.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/13923127928.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/numobenomatamazuk.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/rokunanonebataduxalawu.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/1/0431/6728/5408/files/car_driving_simulator_games_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2680/3619/files/tomijilupuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4891/4081/files/huniepop_mod_apk_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/form_ftb_3522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/autocad_electrical_symbols_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/41133342532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/95533677879.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_off00004aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA7 4972 bytes
SHA-256: 6a516352b0092a7c9af4e1d10cdf1afc9ad8f4c961498ad264fcb5b3bec8e6d5
font_01_sfnt_off00005b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6B 10064 bytes
SHA-256: e3e26fb84be330545304b9e68f8cb5c13cc4492ff1aed27fe45a928eb17ffee1

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