Malicious PDF — malware analysis report

Static analysis result for SHA-256 01882f742fff1abc…

MALICIOUS

PDF

96.9 KB Created: 2020-08-18 13:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1c5b2a0ae044b86568bb8c63292daa9 SHA-1: 6fe4dcb6420e96ace914f3d5eb92cb4480add9cd SHA-256: 01882f742fff1abcc3235febddde70001316685f992ff3de51826b28431bb24e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on Shopify and other domains. One of the primary links, https://ttraff.com/pify?keyword=arijit+singh+songs, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Arijit singh songs' and the wkhtmltopdf tool, suggesting a lure to attract users to 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://ttraff.com/pify?keyword=arijit+singh+songs
    • http://files.choosehadley.org/uploads/1/3/1/3/131381288/xowalizeseg_sixipaxupuxo.pdf
    • http://nowela.kahuiakokimotueka.com/uploads/1/3/1/4/131407995/3201637.pdf
    • http://files.merivaki.com/uploads/1/3/1/3/131379718/1688770.pdf
    • http://files.dianedildineart.com/uploads/1/3/1/3/131382696/lugabiligeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/8683/1004/files/nowoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/romevapiwuratup.pdf
    • https://cdn.shopify.com/s/files/1/0430/7314/2935/files/go_with_microsoft_office_2020_volume_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6041/9989/files/babimugavarekofixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9751/files/lesilexuximeze.pdf
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/acceptable_forms_of_identification_for_real_id.pdf
    • https://cdn.shopify.com/s/files/1/0429/0147/1388/files/letokupadixedi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/construction_company_portfolio.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/ct_ni_file_min_ph.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/vimesaniseborobi.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011785.bin
07ccff338b8070a6a02bf2de31289040314e36818fd0332075817fb62339f570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11785 4768 bytes
font_01_sfnt_off000127b7.bin
748a37b57a24610cbb0ebb34dbe6ec880e8e8976f3d0b2356dca7fd8d888e941		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127B7 10408 bytes
font_02_sfnt_off00014b5d.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5D 16164 bytes
font_03_sfnt_off000160b0.bin
e784e91fa07d3fe06a786de32ce3c91fa802310c3a8bf914d5d5afc71e0b667d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160B0 5928 bytes

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