Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dc4925db7f58b5…

MALICIOUS

PDF

48.5 KB Created: 2020-10-28 21:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3b0767dc3169fa12036c25a615fd470e SHA-1: 118c7d84fa1d3ac0915c8708798bc3598b7705d2 SHA-256: 08dc4925db7f58b5b47621dbf0adf5616a1a5f1bc760b9bf2debc743eb102215
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.link/123?keyword=beeman+p17+silencer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f87583f7ff95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f987ac9e6cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f962db5dd032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408703/normal_5f92f66074a4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f88c6f163bc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7247/9930/files/nunagurazodakirudu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/53178783199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8081/0136/files/35008446051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2a419f-d436-4ee2-a75e-dcb6777df885/40016577129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8434/0118/files/vekupolevavim.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/arable_farming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/zofunonewejabikuvado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62de7e79-9d99-4daa-8421-cb321c7f7078/conversation_casanova_how_to_effortlessly_start_conversations_and_flirt_like_a_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0490/3591/files/jiges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9177/5654/files/scope_of_human_resource_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/fivedawepukirizoburubaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/098dab0a-5d33-4bfe-849a-deee9b13d004/58603949204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079fb706-98ce-437e-9c22-66b33cebd3f3/zewegedife.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/gree_air_conditioner_remote_control_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/road_and_building_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/50403070651.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/68690328598.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/farunezoxulebud.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/bnficiaire_effectif_tunisie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/niv_bible_epub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3390/2247/files/jalar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd792e2-5f95-485e-abe7-a0e0e86999e0/allopathic_medicine_book_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000745d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x745D 4856 bytes
SHA-256: 225d2d3c3f3b14978b563da1a3cf9676afce2cfcb7f8b8e6116ccceb6dce09f9
font_01_sfnt_off000084b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B7 10008 bytes
SHA-256: 9d71d384ba02ed262c1f4846075bd64a63ba00c0919d16b3833384c01ac723dc
font_02_sfnt_off0000a688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA688 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361