Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c687dba967623da…

MALICIOUS

PDF

48.7 KB Created: 2020-08-14 10:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ed56451074c6d042652c64f36135765 SHA-1: d42f3d88723ce7ef0967110471f798a92b7055d1 SHA-256: 8c687dba967623dad15a094f0b3d877d07d38cbf0b866f26943381030b60c1ea
152 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, disguised as a "clockwork orange pdf download". The PDF also hosts a large number of SEO-optimized links pointing to various PDF files, likely to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead the user to harmful 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.cc/wb?keyword=clockwork%20orange%20pdf%20download
    • http://tafedunuv.thenaturalgrind.com/uploads/1/3/2/6/132680813/7058999.pdf
    • http://vejex.livelively.co.nz/uploads/1/3/1/3/131379698/jorinofogetikab_fafapagexalupe_demusugurebu.pdf
    • http://files.difortea.com/uploads/1/3/0/8/130813855/nazopidadulez_dojujipajafol.pdf
    • http://files.scienceclassroom.com/uploads/1/3/1/4/131482968/3f50bf337.pdf
    • http://files.scienceclassroom.com/upl
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/pisewa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/belajar_bahasa_arab_pemula.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/73869169304.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/wutaxamopev.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/50866615782.pdf
    • https://cdn.shopify.com/s/files/1/0431/0364/9954/files/37189036700.pdf
    • https://cdn.shopify.com/s/files/1/0434/6799/7344/files/pomol.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/78885114863.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58933331969.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2491/files/arrl_technician_license_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/hive_druid_integration.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/nezifuwubitovugujumogalo.pdf
    • https://cdn.shopify.com/s/files/1/0455/6609/9621/files/74633790504.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068fe.bin
fcc5030bb9c8d50ac5763f7ade360d91a452ddb46295a8b50eb39c5dedae629d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FE 5204 bytes
font_01_sfnt_off00007ac8.bin
55e998d6709a91def6aa077510640dc3723ae483e9d6c97136a195659ef8c867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC8 10192 bytes
font_02_sfnt_off00009dd3.bin
c33e34080bd8b8dadcddf9a3db519a5adb9a2e12cb87d9ae524621f1503ba10a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD3 16708 bytes

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