Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de0c3fdf4506971…

MALICIOUS

PDF

44.7 KB Created: 2020-10-28 03:35:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73f5a1ebc93b01f161637302ccc9ae4f SHA-1: 79688fb8f1016fbbb9ff8904277344327ac29d7f SHA-256: 9de0c3fdf4506971710812ab3211dea6202a8b134a55f346276fe4b27dc64153
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a link farm, embedding numerous URLs that lead to redirectors and other PDFs. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL pointing to known malicious infrastructure. This suggests the document is designed to lure users into clicking these links, potentially leading to malware downloads or phishing 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://cctraff.ru/strik?keyword=blue+goose+bakery+st+charles+il
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/dumevovereziwinefu.pdf
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/pometajoj.pdf
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/karulubenawope_rodifanabafu_fosaloripejeno.pdf
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f979235be55b.pdf
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5f8d5cbe6e76d.pdf
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f8b25617a611.pdf
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f8e98b1a4c83.pdf
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5f92404730a26.pdf
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f8b1b9e6b4b4.pdf
    • https://cdn-cms.f-static.net/uploads/4410694/normal_5f95f56281afe.pdf
    • http://www.bluegoosemarket.com/Sch
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/bbb645c0-3688-4606-b610-9bb69149c8c4/33562683118.pdf
    • https://uploads.strikinglycdn.com/files/1dc29f5f-3476-43c8-b94e-881d531bdecd/download_film_si_doel_the_movie_2_in.pdf
    • https://uploads.strikinglycdn.com/files/f2150bc0-8b78-4769-b70a-cdaef6c16bc7/11696896287.pdf
    • https://cdn.shopify.com/s/files/1/0486/6424/8470/files/faneguleravotodos.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/memoveveni.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3814/files/3pcs_sectional_outdoor_patio_furniture_charcoal.pdf
    • https://cdn.shopify.com/s/files/1/0441/0530/2168/files/66749957848.pdf
    • https://cdn.shopify.com/s/files/1/0478/0710/3143/files/lulubox_apk_2.3_5_download.pdf
    • https://cdn.shopify.com/s/files/1/0504/0137/8502/files/decode_stream_online.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c00.bin
03e7cb0251b2f65bc5a4251d6f62168fb082bc83719e5540523545316389a919		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C00 5192 bytes
font_01_sfnt_off00005dcd.bin
4bb636a93abd1ed90f617fffebdd90df8c5a84a6b86e3a02e17ed7c3e3679540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCD 10752 bytes
font_02_sfnt_off000081ed.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81ED 16204 bytes
font_03_sfnt_off0000971a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x971A 4324 bytes

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