Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfde1ade41e7b3a…

MALICIOUS

PDF

45.6 KB Created: 2020-08-12 12:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a56c414af534ea743ec4c6df5ab75e4f SHA-1: 6c50afbf6aafeac581370b1f2918aaa67ee2464a SHA-256: 0bfde1ade41e7b3a28efea8e450a82800e6a6777c99a2aef7eb88a763ae4f77d
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to what appears to be a link farm designed to mimic search results for educational materials. One of the primary links directs to a known malicious redirector, indicating an intent to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=best+book+for+learning+english+writing+pdf
    • http://files.bmtechservice.com/uploads/1/3/0/7/130740053/zeradinexopo.pdf
    • http://wulovenab.petetherockman.org/uploads/1/3/0/8/130814328/8057141.pdf
    • http://files.iyengaryogacenter.com/uploads/1/3/1/4/131453226/b43a8f3507.pdf
    • http://files.emilynolanviolin.com/uploads/1/3/1/4/131483492/6984878.pdf
    • http://www.fotolia.com''gt;Fotolia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/differential_calculus_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovutuku.pdf
    • https://cdn.shopify.com/s/files/1/0431/1842/8326/files/griffiths_introduction_to_electrodynamics.pdf
    • https://cdn.shopify.com/s/files/1/0430/4342/2359/files/44559457950.pdf
    • https://cdn.shopify.com/s/files/1/0437/8509/3281/files/nta_net_sociology_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/free_to_word_doc_converter_v1._1_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/7586/6519/files/www._free_online_converter_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/ziroredugumales.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/pujabuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/git_global_gitignore.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/19651089355.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1623/files/xewowobilagujebumepawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/80392409811.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/zizarezosikafuz.pdf
    • http://www.fotolia.com
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c9.bin
934117f7e4c34bce5e66d2ccfa29aa41da3bae64f093317583d0cb31e26eb819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C9 5648 bytes
font_01_sfnt_off0000860e.bin
1169e722fdabfba3d3d73fd67793786ffd7f87eb8459a74f93311b943e1ae7e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x860E 10120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.