Malicious PDF — malware analysis report

Static analysis result for SHA-256 307622c6f8a85397…

MALICIOUS

PDF

48.3 KB Created: 2020-10-25 04:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf4c96026342ba3dbc9d8cec0ef7933a SHA-1: 714a90bdc2bd1ce3da27fd4673295a7b8bf29a84 SHA-256: 307622c6f8a853976bd5b02235d1bab08699da59fc8f8316fde7e9f77e84edf6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, including one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains URLs that are likely part of a link farm or SEO manipulation scheme, designed to redirect users to malicious sites.

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://ggtraff.ru/123?keyword=extractables+and+leachables+fda+guidelines
    • https://liwobolavus.weebly.com/uploads/1/3/4/1/134131542/kutumoxileliwadig.pdf
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/tipada_lorewiwutewuren.pdf
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/jududuxokukas-povavaxexadiliv-fiwokevewa-sovetago.pdf
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5f88ab02b132d.pdf
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f8bf7dc4e397.pdf
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f94d1f9c4f07.pdf
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f90ba6813ede.pdf
    • https://cdn-cms.f-static.net/uploads/4377410/normal_5f90d614bf667.pdf
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f87e0c232cfc.pdf
    • https://cdn-cms.f-static.net/uploads/4393762/normal_5f93b1fcb7dec.pdf
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f8c7851eba08.pdf
    • https://cdn-cms.f-static.net/uploads/4393193/normal_5f91e3dd9f309.pdf
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5f89980ef2ac7.pdf
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5f91f8c7ac0ce.pdf
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f9123d2d8f13.pdf
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5f8d31aa3f8be.pdf
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f88ae683e36a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/audi_a4_allroad_2020_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0468/8320/9373/files/7219740233.pdf
    • https://cdn.shopify.com/s/files/1/0484/7730/7042/files/sotunipojofabusopuluk.pdf
    • https://cdn.shopify.com/s/files/1/0479/9433/9481/files/escape_to_chateau_series_3.pdf
    • https://cdn.shopify.com/s/files/1/0495/9889/0147/files/34582249136.pdf
    • https://cdn.shopify.com/s/files/1/0439/2203/0760/files/liga_cesar_chavez_santa_rosa_ca_2019.pdf
    • https://cdn.shopify.com/s/files/1/0505/5335/6485/files/analytical_chemistry_class_10_icse_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/god_made_me_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3881/0023/files/zer0_skill_tree.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_off00007da6.bin
5f02594126d8aa99efeb1c8b4fedd89dc116544383b89661a16fa91d1af86bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA6 5448 bytes
font_01_sfnt_off00009028.bin
11993a79b19d3f98a191134b5a42179848ae619f826baef75a4dd4755738693e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9028 10436 bytes

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