Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bb310d9c207d18…

MALICIOUS

PDF

67.4 KB Created: 2020-10-08 01:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 952f86eb70d6a120f1d2646e5e259009 SHA-1: ee79a725b8d75c75e7d597b50743dbaba3dca784 SHA-256: d0bb310d9c207d187ddfcd88c1b81e1204fb75fbd180043eed9904c5f9291373
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/pify?keyword=maestria+del+amor+capitulo+1 In PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/909160985.pdfIn PDF document text
    • https://site-1043893.mozfiles.com/files/1043893/bovuwadurufebewesezun.pdfIn PDF document text
    • https://site-1042092.mozfiles.com/files/1042092/13794131.pdfIn PDF document text
    • https://site-1039492.mozfiles.com/files/1039492/87219800934.pdfIn PDF document text
    • https://site-1039534.mozfiles.com/files/1039534/84075881439.pdfIn PDF document text
    • http://files.robovertoom.net/uploads/1/3/1/8/131871569/fexuzuzadulipi-rifuk-figunidowimuwa-mowopelur.pdfIn PDF document text
    • http://files.artcornerstudio.com/uploads/1/3/1/3/131379875/kedogudovesazixedepo.pdfIn PDF document text
    • http://files.monaghanmentalhealth.com/uploads/1/3/1/4/131437322/jerumerorivugujovowa.pdfIn PDF document text
    • http://tunuragu.apextravelogue.com/uploads/1/3/2/8/132814956/0f32dbbbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/whatsapp_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0228/1123/files/66350710392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2771/2165/files/super_saiyan_8_cac_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3945/7948/files/83392105102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3500/4575/files/60182942503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3679/3237/files/aptoide_showbox_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/6896725972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3013/8010/files/the_price_of_salt.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_off0000c701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC701 5276 bytes
SHA-256: d6b939accfc84d242d2d5b47c500ee98d3a5e2c314893e9e09ec24573aad3642
font_01_sfnt_off0000d8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E8 11900 bytes
SHA-256: 56e419eb6b19efa3301a1ae13a69b240f8e42dd738f9cae9cf00dd0222bc6361

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