Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f19004e7483041d…

MALICIOUS

PDF

44.7 KB Created: 2020-08-07 19:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae8ea965feacd44f3d3008625e5a6071 SHA-1: 260f5e48edc15be2134b1ae46f9bdaf17a74ae46 SHA-256: 7f19004e7483041d43eb8fcca4fd5a39670c39997ff5a6ce8882e3ad79584c66
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many pointing to external PDF files, which is indicative of SEO poisoning or a link farm. One of the primary links directs to a known malicious redirector infrastructure, suggesting an attempt to lead the user to malicious content or further malware. 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=radio+broadcasting+script+pdf
    • http://fenipe.thebaronandthebear.com/uploads/1/3/1/8/131857315/wawopewipilimi.pdf
    • http://files.rottennow.net/uploads/1/3/1/4/131453897/rozizamoma.pdf
    • http://files.lllsussex.org.uk/uploads/1/3/0/8/130813782/warekekuzafik_dikoziwagok_pekunekasevil_jebisomaresiwod.pdf
    • http://files.eo9066.com/uploads/1/3/1/3/131383424/6831557.pdf
    • http://sedikape.walkpositano.com/uploads/1/3/1/3/131380213/ba079161528636.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7744/9366/files/php_console_log.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5795/files/31280473720.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9516/files/liste_des_aliments_riches_en_fibres.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/arduino_programming_in_24_hours_pdf_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9093/5969/files/gitinipibototela.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/augusto_cury_books_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/4096/4759/files/devomaxiwupumoxisodef.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1158/files/wajimu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3298/files/biotic_and_abiotic_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0557/4311/files/risk_game_of_thrones_skirmish_rules.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1111/files/zapujegune.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1125/files/98180887974.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_off00006fc0.bin
1d27152d1483f1f3aeba3da9b084d13468b9f26a542b11a7021592b284f85981		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC0 5436 bytes
font_01_sfnt_off0000824c.bin
2af543e9811b23e8e03a6592712740fa6ce350892ac9905e617b79d99c33cee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824C 10420 bytes

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