Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5c8ec31c7d5faf…

MALICIOUS

PDF

44.6 KB Created: 2020-10-02 19:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b86eb52654b041e07b4100763a98d1d0 SHA-1: e1cf7a5e0afa486370db53bb9506bd8662e18884 SHA-256: 1b5c8ec31c7d5fafcd1a0cdda0cfc1e5d289dff987714f15451cce317bb78195
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm infrastructure designed to redirect users to malicious sites. The primary redirector URL is https://gettraff.ru/strik?keyword=biogenesis+theory+pdf, which is flagged as malicious. The document's structure and link farm indicate an attempt to distribute malware or phish for information by masquerading as a legitimate document.

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=biogenesis+theory+pdf In PDF document text
    • https://site-1040561.mozfiles.com/files/1040561/62308375196.pdfIn PDF document text
    • https://site-1036702.mozfiles.com/files/1036702/tapawapinopupewasov.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/36593512353.pdfIn PDF document text
    • https://site-1040506.mozfiles.com/files/1040506/ziwuximabuvevojofe.pdfIn PDF document text
    • http://deluruw.qutmess.com/uploads/1/3/1/3/131398134/94053.pdfIn PDF document text
    • http://tajuwok.marencoarchviz.com/uploads/1/3/0/7/130739509/pezazom-xovewube-begatuse.pdfIn PDF document text
    • http://meziwibu.hearthfirenordicwares.com/uploads/1/3/2/7/132741064/604396.pdfIn PDF document text
    • http://fafezi.churchweddingspaphos.com/uploads/1/3/1/8/131856827/5968519.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/1/0483/8732/6110/files/8647514064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7820/6111/files/75845862596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5520/8865/files/2946708119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5639/0040/files/51832309156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e588c08-d149-4743-a773-d7b570ac43aa/luves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/167502f1-be3b-430e-ba7c-9a515c49a3b3/mejabusedekelasadigiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4339c0b3-ffb7-4d3c-ac25-becb3e292588/gifevib.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_off00007144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7144 5212 bytes
SHA-256: 2b8c313d7e2011ad5b0dbd0dee8dce26ada3296ff89b44c37751c6bb305aec22
font_01_sfnt_off0000830e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830E 10188 bytes
SHA-256: 879393688c5cd20f7a910e21d1143a55ba59d6e10c691f9eaaa1a744cfab61d3

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