Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f6ddff9b1416fa…

MALICIOUS

PDF

41.5 KB Created: 2020-08-25 01:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bae7b5a0a2e3060f8ed404ce17def038 SHA-1: d8e36a2f11815fce623bcf36180791e29ae0a446 SHA-256: b8f6ddff9b1416fab25edfa535966d0ac6d9b8a684175e26b7550b4d1dcc497f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) and are presented with deceptive keywords related to web development. The heuristic firings indicate that the PDF is designed as a link farm, with a critical finding of a malicious redirector link. The ML classifier strongly supports the malicious nature of the document. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=include+html+template+in+php
    • http://files.pathpointstowellness.com/uploads/1/3/1/4/131437474/19039c2396a9.pdf
    • http://zegofis.boxerboogiefun.com/uploads/1/3/0/7/130775413/bijagajeg.pdf
    • http://files.childrensbreadministriesinc.org/uploads/1/3/2/6/132695517/tewiwe.pdf
    • http://files.clevelandpsychologicalassessments.com/uploads/1/3/1/4/131407734/buwiwaveduzuko.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/kokalevaritetobavezi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/53906169567.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/binomial_theorem_worksheet_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/bafigik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/36672430648.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/pneumonia_management_guideline_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/gawofotovipevido.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/ideal_kitchens_chicopee_ma.pdf
    • https://cdn.shopify.com/s/files/1/0434/3978/4103/files/bd_railway_time_table.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/jananazojurumekevija.pdf
    • https://cdn.shopify.com/s/files/1/0437/3102/6071/files/sql_database_file_formats.pdf
    • https://cdn.shopify.com/s/files/1/0459/9942/3647/files/palliative_extubation_guidelines.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006318.bin
9053f72ae8dae6189bcd4cfc99157e8befc8544e20187aa40fec837e10eee2e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 4976 bytes
font_01_sfnt_off000073cc.bin
6dab8e9360cc177496461524a6fb63e800c7478c7373063a49ae1d79007778cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x73CC 10980 bytes