Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cdb506e02fa311…

MALICIOUS

PDF

43.9 KB Created: 2020-08-12 13:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 125f38f49ac4cbbd6febc11f24083b82 SHA-1: 814d4163de89f3f1259c0d8577a769fc8a487329 SHA-256: 63cdb506e02fa31165c6bf0f5877a2d4e7f9268018582ea549138f89e313f955
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a search result for a song tab. This indicates an attempt to direct the user to malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the redirector link strongly suggest a phishing or malware distribution attempt.

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.ru/pify?keyword=beatles+here+comes+the+sun+guitar+tab+pdf
    • http://files.bellvillerent-all.com/uploads/1/3/0/7/130776073/sogabet.pdf
    • http://files.southcoastmotorcycles.net/uploads/1/3/0/8/130874115/1643504.pdf
    • http://files.sculptsocial.com/uploads/1/3/1/4/131438843/banufigedinaxorizegi.pdf
    • http://files.hoopdynastees.com/uploads/1/3/1/4/131453633/dezakewozupometujan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/jon_rogawski_calculus_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/dixadizixapebovuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/xanivoloduza.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/negative_personality_adjectives_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/likuni.pdf
    • https://cdn.shopify.com/s/files/1/0431/8923/9969/files/departamento_del_caqueta.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tusag.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/bovolosumugegosinivo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/ordinal_cardinal_numbers_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/locus_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/megibivivarurokoja.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/misres_du_dsir_alain_soral.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005259.bin
743489d46759468b1d7ffc7028c40e17e1a543930f00786d18afc7437fb134af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5259 5640 bytes
font_01_sfnt_off0000654e.bin
838e9be6ea601c54a250ec434ec8957aaceed3498ec870fbc5a002011c3ba563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654E 14500 bytes
font_02_sfnt_off0000929c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x929C 4324 bytes

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