Malicious PDF — malware analysis report

Static analysis result for SHA-256 af242a31768a6eec…

MALICIOUS

PDF

85.5 KB Created: 2020-09-30 11:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: c4d1884b7f67bc3c8f5eba6239367da8 SHA-1: 2ae0e9b871e26314470f0cf34bba0c60e0c9102a SHA-256: af242a31768a6eec02c8e57046358edc16d34c824354416ad0aba7d9a943e617
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=svt+1+bac+international+maroc+pdf In PDF document text
    • http://files.donnamgoldstein.com/uploads/1/3/1/6/131637016/tojejub.pdfIn PDF document text
    • http://files.leftbrainwritings.com/uploads/1/3/1/3/131379034/4503081.pdfIn PDF document text
    • http://sikukime.hlmanagement.org/uploads/1/3/0/7/130775288/gogukuxuses-nezedake.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/xelukokizamas.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/zufila.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/1/0431/8180/1629/files/arbitraje_internacional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3354/9205/files/building_construction_and_maintenance_engineering_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/solving_equations_with_brackets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/50437774266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1cbe504-fd5b-492f-adfe-e3b34cf96786/95858294127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4993cf-402c-43fb-a436-a5956602194d/79011722869.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00011566.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11566 28804 bytes
SHA-256: 93c3dbb64a02ea7416e083f3df7f43a2601776ae038e4a73526753eef3637a5d
font_00_sfnt_off0000d696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD696 5476 bytes
SHA-256: 201ba58cba63c1982c1226e37c8dcc3323e6f4abd182afa72c1f40174e768e7d
font_01_sfnt_off0000e931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 14216 bytes
SHA-256: 18d5d00295f16bfa88e8527ecc4466693a66d1db717a35aedf173f0b34bbc0fe