Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e3bf73c68692e3…

MALICIOUS

PDF

45.1 KB Created: 2020-08-16 19:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 193d4fddd767e42778ae377c158795a6 SHA-1: 10cc8f891ba7b07f766b83f9826bd44300bba1ed SHA-256: 02e3bf73c68692e327bddd7759601d584986eb01a407e40a2f729f5eec03c7c1
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. Another critical heuristic identified a PDF link farm, indicating a large number of outbound links. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure and heuristics suggest the PDF is designed to lure users into clicking malicious links, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=introduction+email+template+new+team
    • http://files.enfieldrefugeewelcome.org/uploads/1/3/2/7/132740234/ad6b7ce8eb8d9.pdf
    • http://files.aatp-mysterygames.com/uploads/1/3/0/7/130775737/sujit.pdf
    • http://files.dvanminsel.com/uploads/1/3/0/7/130776249/1903589.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/3809/3990/files/gujureje.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/saxutazokazizezelafel.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/90811012653.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/lomevujinevozimunetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/mcq_answer_sheet_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/whistleblower_complaint_full_text_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2650/4086/files/92141407820.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/css_title_case.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/xezuzapo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/tegumudolekalodinijibiso.pdf
    • https://cdn.shopify.com/s/files/1/0435/9412/1379/files/pavidoxeliwomema.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/compaia_botanica_libro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/97694033987.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007271.bin
e270cee1f2f516d2e22dfccb0407d0db001f31bac3024c04272747c03a84b788		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7271 5072 bytes
font_01_sfnt_off000083a0.bin
bf38a362f38bc31b1c23c01a0f454a8a674329c50c15dbecb98c099d2c5b4012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A0 10636 bytes

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