Malicious PDF — malware analysis report

Static analysis result for SHA-256 c974d777942e4982…

MALICIOUS

PDF

46.9 KB Created: 2020-10-25 10:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 5a47bfe1652f2791e0fb741f3a4c6dd8 SHA-1: 56e75e42741d38e3740fe8af8379ef075b0c4044 SHA-256: c974d777942e49825812bbd416f0e92415a2e135ed653dff3212835a6c5512e5
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.link/aws?keyword=small+restaurant+business+plan+sample+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f8b0f7f073ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5f8a24b2e1b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5f88808ba9f4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f91ba3a7ba44.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/3784391.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/jasufikagurimu-satamim-rawagozexonopif-gabubonawigev.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/de68f52578.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007837.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007837.bin)
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/average_value_and_rms_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7348/5982/files/giwos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8125/0988/files/47634756056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/jerabaxexos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6629/6986/files/fewuzidisutedoz.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/federal_supreme_court_cassation_decisions_volume_15.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/578285652.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/band_knife_cutting_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/aditya_hridayam_sanskrit_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/automobile_engineering_books_download.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/emphatic_pronoun_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/10203782901.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/lipodaronetej.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/unisa_assignment_cover_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/persian_to_urdu_dictionary_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/basic_engineering_drawing_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/7524652828.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/importance_of_achievement_test_in_education.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 extracted file (font_00_sfnt_off00007837.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7837 5428 bytes
SHA-256: f8b457e38b66a9cfaf1675d38c556418d7ef52caefa06a3f325caaf11d337615
font_01_sfnt_off00008a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A87 10268 bytes
SHA-256: 0c1d374b49c78b70f01b795ad14999e9498d4cc5124df3532b6efd8bee5a25e0