Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e5587c7079536e…

MALICIOUS

PDF

41.0 KB Created: 2020-10-29 04:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 09c0b33da6072126fb7b5184dba0397b SHA-1: 0a8d814db3ba01dd40e01d546f6b39833cd45ae5 SHA-256: 38e5587c7079536eee485080cd37959326b84e18dbbb8d493ff914204237aa76
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/123?keyword=gigantes+de+acero+2 In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.pdfIn PDF document text
    • https://ligexomapaku.weebly.com/uploads/1/3/4/3/134321337/sukope.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/6d55d987.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/21684.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00006103.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00006103.bin)
    • https://cdn.shopify.com/s/files/1/0492/3608/2844/files/all_in_one_toolbox_kickstarter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2251/5865/files/cascadian_farms_granola_bars_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0141/3785/files/rulonavexataziv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7024/8902/files/59270289359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9325/7109/files/ribesupuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/3d_anatomy_for_the_artist_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5739/5865/files/fekepudusirudovafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9846/7229/files/dd_beyond_racial_feats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0745/1041/files/zauroczenie_margit_sandemo_chomikuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/dent_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6394/1541/files/gezofam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8748/5333/files/33052602361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2626/7291/files/rujoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8547/2954/files/26875738676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6035/4968/files/pusilomevuzadixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2076/5344/files/n64oid_2.7_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/health_and_safety_manual_handling_maximum_weight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7448/4924/files/75717446706.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_01_sfnt_off00006103.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000551e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x551E 3304 bytes
SHA-256: 7db4aa9dcfc42b3a6ef9a04f555e0b2fea6a31cf0b1e3bf67d3f0cf3b72bc559
font_01_sfnt_off00006103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5236 bytes
SHA-256: 3962ff8835f89e6166604a59079ddb16a8a76956aa00b09fcd320a3b983882ed
font_02_sfnt_off000072e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E3 10820 bytes
SHA-256: c71823cba9fdb4e88a6bb1bf9777d2ec74f30553f15d053e3f966a4b131cff2f