Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dbb6d7708e44432…

MALICIOUS

PDF

68.8 KB Created: 2020-08-21 20:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29cdf88d8db3affc7865dd653dad4342 SHA-1: 8586740a4cae71c778f748c00b639ff7f07e0110 SHA-256: 6dbb6d7708e44432c09835a176d1be06dcb38e8947fb8b1f90911a5d11bc0973
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of numerous external links suggests an attempt to create a link farm or distribute malicious content through various channels.

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=all+spongebob+meme+formats
    • http://files.lorgemusicarts.com/uploads/1/3/1/4/131483279/7272369.pdf
    • http://files.butterflyloveministry.org/uploads/1/3/0/7/130775987/jolor_palogakufuf_kipegajijose.pdf
    • http://biwolukug.writerial.com/uploads/1/3/1/8/131871871/9396567.pdf
    • http://wofuleti.aurorabreath.com/uploads/1/3/1/3/131379246/mosoteponebajanupat.pdf
    • http://files.neeleyrealestate.com/uploads/1/3/2/7/132740412/remukij-lunufoxire-vipedapamux-xesaxovaranu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niborenegukudokeregus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/dadedureto.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/39037690253.pdf
    • https://cdn.shopify.com/s/files/1/0434/8031/8118/files/reviewer_about_agriculture_board_exam_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1783/files/19906698781.pdf
    • https://cdn.shopify.com/s/files/1/0439/3133/6859/files/89074887310.pdf
    • https://cdn.shopify.com/s/files/1/0433/5062/2358/files/marketing_information_system_in_mis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/32208348230.pdf
    • https://cdn.shopify.com/s/files/1/0433/4206/9918/files/sozusozukojesozazajed.pdf
    • https://cdn.shopify.com/s/files/1/0438/1320/8224/files/zalujobomisiraxedefafeze.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/brackets_editor_portable.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/zegetegipiniwiki.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/14587519495.pdf
    • https://cdn.shopify.com/s/files/1/0434/7589/4437/files/link_up_beginner_student_s_book.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_off0000cf31.bin
695854ce69a067b39ef30404efebc6c26aa1cfd28b9e6bcf0138bf432d5e032e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF31 5348 bytes
font_01_sfnt_off0000e144.bin
1b722c68f26cdc2fe534e515baa073328fd5bb209d7d7ff94f2b7404d0f9e23d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 10632 bytes

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