Malicious PDF — malware analysis report

Static analysis result for SHA-256 9659aba08c8ce852…

MALICIOUS

PDF

64.5 KB Created: 2020-10-15 19:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: fb8bbb71fc10c5538f0326fed92326ff SHA-1: e8f3c2b5a4274c1be978abd4b7788f327240070b SHA-256: 9659aba08c8ce8522b1b9d25cae38a3e3cab0a128c2e5aa4d3e4796191e81f7a
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/123?keyword=ninja+warrior+apk+game In PDF document text
    • https://site-1039970.mozfiles.com/files/1039970/42230956311.pdfIn PDF document text
    • https://site-1042622.mozfiles.com/files/1042622/wemalopovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f878093a7f5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f887b8b0340c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f88065ecf53e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f871d7f72b39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f87e09d99752.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3273/0008/files/lubowexuvekej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/right_stuff_detailing_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/68420757679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/2018/1414/files/state_superintendent_of_public_instruction_idaho.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6604/2784/files/86922368456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7479/8247/files/wimpy_kid_books_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9343/5589/files/samsung_46_inch_tv_power_supply.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1918/9915/files/savipesabovewum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0949d9-231c-4a61-ac86-875fcafc4644/texugalelavuxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554e227f-a9e0-4313-99e7-52210aabb8db/zigejoxamafivibekobali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6bdd975-9dc5-49e1-9899-d33f82b50f1c/ripekibadikom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab2aa8e-f383-4f10-88fb-cfe26b2be1a5/55824705429.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_off0000b23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23B 4836 bytes
SHA-256: 1d0cdea030e307ed2153b4f493c5c93a392e4bb28c99f9cf6176e3bdedf43907
font_01_sfnt_off0000c2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A1 10580 bytes
SHA-256: b2ded7cf2d905caf1f07dd0263d58cf5c9c521d45f0ed42e45b1ba3a1c01f03c
font_02_sfnt_off0000e6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3