Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34a3248cbee0292…

MALICIOUS

PDF

46.0 KB Created: 2020-10-23 22:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 85cbafd30a8a66ebca5805c07a6cf1a5 SHA-1: 9cd89c012577a8443a2315d3237c97ce1d943945 SHA-256: f34a3248cbee0292f96a826b95324abe7ac9b6b902550dde3c63ba0a1254a9c9
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.me/aws?keyword=album+jet+vive+la+aventura+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f8d33e9722fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f8ba78cde85d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f88914711bf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5f91f5e7902cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8706280e0d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f8b03a44530b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_5f8ee671c784a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5f8f93b9511a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f88963404e24.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/4616595.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/fe2c5017a73c7a.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/purom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3580ee-4594-4809-b9be-4b06c8936788/need_for_speed_rivals_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c486dd47-7db0-4e89-aa5f-f4f502bd0c8e/work_today_paid_today_columbus_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d70494-8888-4831-a22b-495302c6a874/fichas_de_lectura_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a08f4aaf-6cd6-4fa3-9c27-8435d1c42be2/varianza_de_una_variable_aleatoria_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da476b65-b180-4bb7-ad59-6d627e77b2ca/vatagufutegezigukafuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab383762-1be1-4656-bed3-f470deee44f9/30134979852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236ab584-96c5-4d60-8098-4103d538f379/68666423087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ed69b0-c737-4ec5-993f-0d7a2c516b61/vapor_pressure_lowering_problems_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c47be24-0d80-4239-9c7e-ffd2b7c8bb22/84585974304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd42dd1-137c-465e-80e0-e8d7256d4397/aadc_full_movie_lk21.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_off00006b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B76 5276 bytes
SHA-256: 2eb564c778114477c8478818ecae11344fe77e3d47f84db80a449db4a470b461
font_01_sfnt_off00007d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4B 2052 bytes
SHA-256: bc21c015adee0192ce236e24f36b828f3ce5f4f93ee50b079cf2729902495525
font_02_sfnt_off0000862e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862E 10768 bytes
SHA-256: bfd35e6d38c65b09ab8abecb26e178ba34b85c996d5abc099b123acf87f35205