Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d446f59070dceba…

MALICIOUS

PDF

63.4 KB Created: 2020-10-21 02:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: f353684761253f25bd3ffe930e1148ef SHA-1: 83688c391d028d80e3ed7590429ca9a72f20b59d SHA-256: 4d446f59070dceba67cbf12d373bc30fe2a218d063faa93025b0f6224dd2910a
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://gettraff.ru/strik?keyword=gta+san+andreas+cheats+playstation+2+weapons In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f87028010ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f8f5acf6fbbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5f8a7b57ec4c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8a4743c5367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f8866cbebd15.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/subud/54461508919.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/tuximewojabedafojivarofi.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/20201907284.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/5407669148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2626/7291/files/android_browser_download_any_video.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/india_map_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/vukumimolepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9306/4870/files/lepisavabivotisez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/lens_or_lens_oxford_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/total_war_attila_religion_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1061/1607/files/twas_the_nizzle_before_christmizzle_and_all_through_the_hizzle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9314/0676/files/davoruvewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4970/5881/files/fejuvigatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7887/6829/files/nikozifolujelelavudus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2439/8528/files/google_forms_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/78993409422.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_off0000b1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C4 5516 bytes
SHA-256: 0c6570977573f306b694fba7f881153c528f824ecc7f9a461fc4781b46556bb8
font_01_sfnt_off0000c498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC498 13712 bytes
SHA-256: 2a4608b439264ee6cfec72470cc6a5cfc9994bee1f413063434581922beb9c7c