Malicious PDF — malware analysis report

Static analysis result for SHA-256 832d67b369797c7e…

MALICIOUS

PDF

51.9 KB Created: 2020-10-27 10:14:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 913a188ee4b337fa8c05c47cb80ada15 SHA-1: 61d7999e61aa63ac79f5690f1dc73cee182a6609 SHA-256: 832d67b369797c7e051615a86699ff1bab00b31bd2cee1c295234707bb972c0b
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.me/123?keyword=reedy+creek+school+supply+list In PDF document text
    • https://xivixomepovi.weebly.com/uploads/1/3/4/5/134518427/mirorasani-noxejadakiro-bumadape.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/5690278.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000683a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000683a.bin)
    • http://fedorahosted.org/lohitIn extracted file (font_03_sfnt_off0000a835.bin)
    • https://cdn.shopify.com/s/files/1/0499/4246/2618/files/91986319572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/pengertian_kajian_pustaka_menurut_para_ahli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5017/9999/files/dekunegifupadevotuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9661/9193/files/67141326537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2410/5115/files/pressure_canning_tomatoes_without_lemon_juice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46bfe015-1c23-42e8-99e8-dd14b48076e9/pojifenisolusawoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a87222a-af21-4383-b9bf-f4e81494c8de/85749868815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/webinar_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0225/1432/files/what_is_called_thinking_by_guy_holmes_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2888/7714/files/fnaf_6_android_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2688/9374/files/qt_creator_compiler_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5944/4382/files/koziluwakikafofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/8863/8876/files/globalfiler_pcr_amplification_kit_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3953/0389/files/tumivojodurifanidek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2227/5992/files/42071337058.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_off0000683a.bin)
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn extracted file (font_01_sfnt_off000079a6.bin)
    • http://www.gnu.org/copyleft/gpl.htmRegularIn extracted file (font_01_sfnt_off000079a6.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000683a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683A 5124 bytes
SHA-256: 2b5bf37ed31521a4ef95bef5f48b3a0dc4cc4ba0403c500f29f7932d85bf4ae7
font_01_sfnt_off000079a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A6 3772 bytes
SHA-256: e2c7bb3c6d2fbc6b9680c858ce58af9e5cd0e4fbc18f33bdd2ad1d5654d08a87
font_02_sfnt_off0000854a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854A 10692 bytes
SHA-256: 71b14d0a796a6b67bc9c140aba449951d480225bfd157f7294b1fdb0230fde1e
font_03_sfnt_off0000a835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA835 7556 bytes
SHA-256: dd74fdbafb04883592f14bc85675a9bd2091ac09bda1873fc5ee363d7beba2aa