Malicious PDF — malware analysis report

Static analysis result for SHA-256 43869e23cca7be8a…

MALICIOUS

PDF

49.2 KB Created: 2020-10-16 19:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ec19655f4fe1eb82c54740846c4de40e SHA-1: d1820e690f827b3942d8be2c0d36cd669ac8ed83 SHA-256: 43869e23cca7be8a35b8ec9682c9189a94d2c048049e96e252d6ad8cd4abf803
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?keyword=windows+mobile+android+apps'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs and redirector link are strong indicators of malicious intent.

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=windows+mobile+android+apps In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f873e98c02b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f894d0b6fe3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8728c115952.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/4339558.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/fitonumijebarovepiso.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/totemugoxu_vapotilewawes_pikumil.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/xazexelumiboru_vozivexorifisug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5f8997aa1a0f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f885c7d9fb0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f874a726e0e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5f882c5c01267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1773/1735/files/78760370170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9920/4000/files/45465571310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5022/8119/files/college_of_winterhold_quests_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6800/6040/files/135799264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9053/4307/files/water_cycle_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e4f854-7fac-4e57-a79a-396a7d139e36/24667223833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b446cdb-6d41-4816-bcf8-8ed3c71264d2/37860601929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68dfe675-bf27-46eb-afde-0dfc922fcae2/tigug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeba58d3-e507-41d1-ada8-4f4b87066c58/dozibiterabad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398a2b92-4a5b-4f06-9d78-94c70ac4e22b/86435704806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc72eddb-12a3-4f9f-b3c7-497d74ab8001/55774588270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ee803e-ac35-40ad-8b60-aae5c3fbcd33/xemikexozisuvudajugopo.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_off00008058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8058 5348 bytes
SHA-256: bb993872f74dc16389c79b8bf0db836d16756f9d5b9f5f0708b8a01c6b10e9a8
font_01_sfnt_off0000927a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x927A 10772 bytes
SHA-256: 23c8d42e5959df391652a860ff5c33ba03563ec68cde816f206f0f14681c2a1f

Open this report in the interactive analyzer, or submit your own file for analysis.