Malicious PDF — malware analysis report

Static analysis result for SHA-256 780f615635df2b9b…

MALICIOUS

PDF

42.0 KB Created: 2020-10-26 06:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ad7ccf2ed7ec0a71672eac8c17bc3175 SHA-1: 98cdd6524b30dddff40d2d845dd825710ca208db SHA-256: 780f615635df2b9bd43a79b2455b4450cd0afe3b22cdbe7707cc995ed2a60387
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/aws?keyword=list+of+ornamental+plants+in+india+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f8cbdf5754b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380070/normal_5f8b0e14571d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411682/normal_5f94c5038a3b2.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/susopuzupure/dewatikul.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/3875590323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/zolepudixeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/episode_guide_this_is_us_season_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8171/5878/files/omron_blood_pressure_monitor_model_bp742n_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3308/2014/files/xomisagafirivixinala.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/wewizija.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/zosyn_davis_drug_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62623959-a51b-471a-9188-b4026abadebe/the_gr8_db8_sqa_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dddf4820-f14e-4af2-9e6b-0b0dbddb71fd/xopipomodosixixenepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd7a687-aa73-4516-8ba0-81ec57b323bb/suwegigamefotupev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dbb818-34e1-478e-8c32-0ba0ec6c5954/flavien_allenspach_und_sabine_dahind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64db981-5a67-45ce-80e8-7d4bef68a700/situacion_didactica_de_navidad_para_nios_de_preescolar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7478/7739/files/57855905985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7108/7007/files/gift_card_generator_apk_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/bowib.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_off0000640c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640C 5128 bytes
SHA-256: 2382c9b3be894289483ff0daa55ace40b9c258876009b72339fc00065208e07f
font_01_sfnt_off00007562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7562 11548 bytes
SHA-256: d73329e83b938ff5309bafcb8985fc76231d6f69a20da3418b61d371b98c7add

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