Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d805f8c1a99666…

MALICIOUS

PDF

39.2 KB Created: 2020-10-28 22:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c4ee45c3e5c1eee4df5bf94ee0a040ae SHA-1: 83d778689d7f6bc94ad419b74df0b88c31c1a00c SHA-256: 60d805f8c1a996668ae17a3b268e48c2a07b7937a1bd4bbe7cb4f690d5eb66e5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 appears to be designed to manipulate search engine results or redirect users to malicious sites through a link farm.

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/aws?keyword=waterproof+cotton+cloth+ffxiv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f879e93cf3a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_5f90ee6263eb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_5f8f956285b3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_5f95d6ee6a56f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_5f8aa9e538c6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f96896b90e96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/algebraic_expression_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0ecc0d-b9d3-4ca0-a3bd-3873e39721da/venidalupivapamoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/datuxiwelatomesojuvegevak.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/91097703615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a9f550-f3c5-4189-8d49-b35ae07ef733/sodox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0f5c9d-c9a2-41e3-9a6b-9570ca750348/51165139759.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ancient_egypt_map_activity.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/38232482121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c018c7-3a05-44b8-bdaa-e7024290efe3/48046666283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3637e4f3-732b-4218-95bd-c52adb1f68f6/palesevafokudebuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2844/7900/files/dd_3.5_handbook_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8741/6475/files/black_ops_3_shadows_of_evil_beast_mode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/sql_manually_increment_id.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6680/9241/files/64879326591.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/51468567702.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/similarities_between_parliamentary_and_presidential_system_of_government.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A15 5064 bytes
SHA-256: 00b67b8fa395b114660c892b9cbeb305999f4a6c3ab8126e096ed6c887b4593b
font_01_sfnt_off00006b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B60 10680 bytes
SHA-256: 93bad58812d0ee8c817b86224d39b902e06f835ab70d499fd6f75d033d8e6b83

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