Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae55372671473f1…

MALICIOUS

PDF

45.3 KB Created: 2020-10-01 19:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c8948549de2a8b171667d3227c7b3ff1 SHA-1: d2aa7db286f8b0230ad66399ad1d22b25f733c54 SHA-256: eae55372671473f1c96743b60001d2e13c032e49a066602e4cb7f88c2dd91b77
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, identified as a link farm for SEO manipulation. One of the primary links, 'https://gettraff.ru/strik?keyword=bhakti+and+sufi+movement+pdf+in+hindi', is flagged as malicious, indicating a redirection to harmful content. The document's structure and the presence of numerous links suggest an attempt to drive traffic to malicious sites, likely for advertising fraud or to host further malicious content.

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://gettraff.ru/strik?keyword=bhakti+and+sufi+movement+pdf+in+hindi In PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/54749676659.pdfIn PDF document text
    • http://files.offbeatapothecary.com/uploads/1/3/0/8/130874031/nutusikevizu.pdfIn PDF document text
    • http://zopiji.robpedley.co.uk/uploads/1/3/0/7/130776271/4758558.pdfIn PDF document text
    • http://pikipifer.underonehour.com/uploads/1/3/1/4/131438428/gexokujibivaj.pdfIn PDF document text
    • http://files.ionasoccerclub.com/uploads/1/3/1/1/131164473/mufafesarinab.pdfIn PDF document text
    • http://files.newmorningacres.com/uploads/1/3/2/6/132680962/fitusemef-mifuzejonaxif-limagawebavupo.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://cdn.shopify.com/s/files/1/0483/8110/0183/files/dd_3.5_sunder_magic_weapons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1940/5976/files/ccna_security_salary_in_mumbai.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1608/5916/files/30466958541.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6739 5208 bytes
SHA-256: 829a171f4f1870005c827aea2494bdd398593a2e9eeba787a5b31aeb616b96e5
font_01_sfnt_off000078d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D1 9864 bytes
SHA-256: 56a20c544568a290b6116722b58e432680b623a4c77228947d08bf2f12fc6ea6
font_02_sfnt_off00009aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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