Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee9916a5dd8b165…

MALICIOUS

PDF

69.8 KB Created: 2020-10-03 14:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 98d1525e0bb62f616a378e3fabc3f5a0 SHA-1: e29602d2c7586aa6fc4c38d9d9c7abadd9a9053e SHA-256: aee9916a5dd8b165962d0a8214ed259e6ed38677d29566da9f296cfee62fa584
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/pify?keyword=rhyming+words+with+pictures+pdf In PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/migozesarexipag.pdfIn PDF document text
    • http://pamal.sagehairstudioreno.com/uploads/1/3/1/6/131606396/d4ffe614ac8f.pdfIn PDF document text
    • http://files.gemcityfitness.com/uploads/1/3/0/9/130969885/0f44f30e5ebbfba.pdfIn PDF document text
    • http://pamilubus.coastside-artists.com/uploads/1/3/1/8/131857315/penovefuju_rudewekazupa_tebodenewoxowe_rozekolowujizi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8206/3778/files/kapoboja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9437/9163/files/el_dador_de_sueos_descargar_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9441/2963/files/blue_eagle_swim_team.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/red_factor_canary_food.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1829/7759/files/burefujoruzudarurojuriv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/mavipukerudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5468/4565/files/mass_effect_andromeda_guide_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/calphalon_classic_nonstick_oven_safe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/0019/3182/files/black_clover_vetto_beast_magic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3090/2946/files/sirexitanokipogivosutixu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off0000cea7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCEA7 18176 bytes
SHA-256: e43eb858545a4d9b6abacc8c33ec9501d2ae64a4dc3cc092ef357486bb4e7a32
font_00_sfnt_off00004dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDA 6180 bytes
SHA-256: 82ab72f624c6a0cd76ff28730f4c81e4dc6adfa13808d314d04aeba756560aad
font_01_sfnt_off0000633c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633C 5412 bytes
SHA-256: 8aaff55cff0a6157c7d85428d85b83feccc8e04a0fec007e35c9d9d5d25aff83
font_02_sfnt_off00007591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 2896 bytes
SHA-256: 0599c9ecfae83226ddf8912de91c1dd8e8f817ea6a5224e33be64984becafa18
font_03_sfnt_off00008114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8114 2328 bytes
SHA-256: 6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
font_04_sfnt_off00008bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCA 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_05_sfnt_off00009595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9595 6640 bytes
SHA-256: c8cb303e765c67f43d6d34f29c1d02953890772ff7b697be779fb29335000f72
font_06_sfnt_off0000a734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA734 11684 bytes
SHA-256: 8b25dee7bf6f1aebb7b79e0e73e689dd320d8136a13074a37175e1ecdedae1c9
font_08_sfnt_off0000eb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB37 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_09_sfnt_off0000f938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF938 3616 bytes
SHA-256: c6d3982d624c4894749895d51d97730145a5fdb8be4c0be36d31aba072178d89