Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e445ca4c9c95223…

MALICIOUS

PDF

74.5 KB Created: 2020-10-26 03:05:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b792d7a379aeb2e13de2b13c08dd40cd SHA-1: 1090340f983e588889da329095155cc055b7e466 SHA-256: 8e445ca4c9c95223162e5ecb283095391a416dd1c7bf4f7f4678f1802c3c1968
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.club/123?keyword=logical+fallacies+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5f8caaf52008b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f95ffaf842e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/56754101209.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/26249361618.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/60096987050.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/tiwodegebena.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/bergamot_essential_oil_doterra.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/conus_medullaris_syndrome.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/cours_anglais_grammaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1292/9716/files/wakimenedukibajakilax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8868/2401/files/zawujafifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9623/5943/files/ruby_supernatural_actress_change.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2658/6527/files/campbell_hausfeld_60_gallon_air_compressor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6245/5200/files/introduction_to_ms_powerpoint_2010_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2906/0001/files/71376866772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8506/9477/files/tone_and_mood_worksheet_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6174/7105/files/31297804421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1192/2856/files/kikoxafasotalabaguwoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2726/files/gta_vc_apk_download.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC413 4976 bytes
SHA-256: a0a2ff8d12062b2183f6c016522de1fba34d1c3b69f226136c4ce5980e12824c
font_01_sfnt_off0000d508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 10440 bytes
SHA-256: 3bc4a9c1b05ae279de0ce13c53115aead1f62d54327ebf1c773b8711c3452b9b
font_02_sfnt_off0000f8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EB 16136 bytes
SHA-256: 1c35dd0f54a1a74832c0d6220adbf02846a676e2f38c0d0352621eb7f033f102
font_03_sfnt_off00010ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DED 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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