Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca73620770b6c5f4…

MALICIOUS

PDF

65.2 KB Created: 2020-10-28 14:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 12ea38f18febf7886b04669482a4bed9 SHA-1: e7f3f3c28c25a0e1452cb2d7a6e532212d4a9705 SHA-256: ca73620770b6c5f400602aecb0b2fe896957abb91d7dedf5e1e7f5fa73f42fe8
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/pify?keyword=absolute+threshold+psychology+alleydog In PDF document text
    • https://puvavijage.weebly.com/uploads/1/3/4/4/134461845/2470399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_5f972ac9a593a.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/fefulipumofegevukudi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5f984ffe1c79a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5f9393442bc15.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/niwudexutisoboruro.pdfIn PDF document text
    • https://gejovekozeja.weebly.com/uploads/1/3/4/4/134401956/xifeta.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/nevatufedosisit-kuxep-fiximifi.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/sijokuxufijebe_jubufe_wexorezab_sovomupomufetol.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/firumiwuvezepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5f8faf419493e.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/6631508.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/fe865465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_5f93ea3120a1e.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/tezofasaganezasaxosi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000bc04.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000bc04.bin)
    • https://cdn.shopify.com/s/files/1/0481/6791/1573/files/zombs_royale_aimbot_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/95281242258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3023/6314/files/jeperevusili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb3020b-f5af-4d82-b13f-066625fe266f/840162786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/relic_run_game_free_download_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0875/3315/files/14958380448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a088c2-15c3-4fe1-9d9f-a358cb3a719b/49801150242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd856e1e-341f-43d6-93ab-f98d5735a399/60287661680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36af8282-b11a-4bd2-b93f-83557000aac0/puginedupunikexubuxatedil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9946/6142/files/29692663922.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_off0000bc04.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC04 5564 bytes
SHA-256: 741d70122cc514da9f8298784824ac90267538d0bef2a8a425300a5e5c1271b9
font_01_sfnt_off0000cee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE7 11672 bytes
SHA-256: 07ef96ceb7133dcf504ebd2e8f1f5d2cbaf3bf623e22d54516c9d291d7ab3b1e