Malicious PDF — malware analysis report

Static analysis result for SHA-256 3667b5c5e99959a3…

MALICIOUS

PDF

45.0 KB Created: 2020-08-20 21:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83a9fde41b52136887b4efeee77d7a3c SHA-1: d5a75c0d39ea372785bb939f552b733d3b87e1aa SHA-256: 3667b5c5e99959a39cf09dedefb275d1a6b9a8be91fe62f6c2af5601bd9d9037
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate that this PDF is acting as a link farm, likely to manipulate SEO or redirect users to malicious content. The document body itself is largely unreadable binary data, but the presence of the malicious URL is a strong indicator of malicious intent.

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.com/pify?keyword=attribution+theory+heider+pdf
    • http://files.lindseyleemiska.com/uploads/1/3/1/6/131636916/5079856.pdf
    • http://files.amiebantz.com/uploads/1/3/1/1/131164236/bizamel.pdf
    • http://files.dkers.net/uploads/1/3/0/7/130739308/mifobiliv_gixuni_wakarafosefevuv_vonutulaf.pdf
    • http://pusematem.aspiecomic.com/uploads/1/3/1/6/131606457/pimugodasazeregex.pdf
    • https://cdn.shopify.com/s/files/1/0431/0397/7634/files/duwawoxomibepalawinefir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8738/9087/files/17381654590.pdf
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/encyclopedia_brown_cracks_the_case.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4262/files/applied_economics_module_for_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/59850123973.pdf
    • https://cdn.shopify.com/s/files/1/0438/1917/2000/files/guide_de_conversation_franais_allemand.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/57673862010.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/pagepugipegamivawovoge.pdf
    • https://cdn.shopify.com/s/files/1/0436/7928/5401/files/murarokob.pdf
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/xiwarubonupajaponupuguz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8817/files/english_writing_skills_ssc.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/synthesis_essay_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/0765/5579/files/minecraft_compass_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0438/4437/0594/files/byomkesh_bakshi_novel.pdf
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/horizontal_progress_bar_android_studio.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_off000072b7.bin
4663cad38d442845d1cd400f18076ec8fb925f0ec67640d9835729e3953f77a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B7 4940 bytes
font_01_sfnt_off00008380.bin
1f59e00e764ed74cebf670e02c8c6f623758f981ef6951b4dda072967224bfc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8380 10324 bytes