Malicious PDF — malware analysis report

Static analysis result for SHA-256 abff1bc9602c4f9d…

MALICIOUS

PDF

43.6 KB Created: 2020-10-28 15:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c7b262a50eaa597372860ec22c56e43e SHA-1: 3f665ad6c82ebe80349e7310c9be186b7bd9f67b SHA-256: abff1bc9602c4f9dfba19e3bd029a04856708a5b44d50fff0a82718f626e21db
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/123?keyword=homework+folder+ideas In PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/e73effb403.pdfIn PDF document text
    • https://gutilutaxare.weebly.com/uploads/1/3/4/3/134333879/2270844.pdfIn PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/22569f296220c7.pdfIn PDF document text
    • https://woruvewuz.weebly.com/uploads/1/3/4/4/134400058/2058269.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/6de3f584a.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/2632034.pdfIn PDF document text
    • https://dumunevebule.weebly.com/uploads/1/3/0/8/130874169/5068437.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/nuvotebanepezax.pdfIn PDF document text
    • https://soxixafefude.weebly.com/uploads/1/3/4/4/134434462/mapezu.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/1/0496/3244/4582/files/fpt_play_apk_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/432ff316-1092-42ef-b7ca-7f44002771b7/inverse_of_graph_laplacian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc0cbb0-10ea-4220-8dee-82fabfb436af/95743591225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/waves_tune_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9809/3733/files/hospital_corpsman_manual_dental.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/karmasandhan_bengali_paper_today.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2635/2797/files/new_south_mortgage_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/boniwidudakiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7973/8567/files/dagizugetadoporepiwovur.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/kizezofebolorabajokofiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/781cd4d5-0527-4b41-a83c-3894754553b9/kegivilabowopugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9160/0568/files/structural_analysis_lab_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/l_alchimiste_coelho.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_off00006c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 5168 bytes
SHA-256: 4e8fc7e2fe8aaa478d39b4d5a745dd37d7dac944324572d2e270b3d1ee6eac32
font_01_sfnt_off00007d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 10412 bytes
SHA-256: 42877aae8a0661877db89682d94f7f6e19f8f882ce9d62b7912d67572ffd9e41

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