Malicious PDF — malware analysis report

Static analysis result for SHA-256 afaf5144f706cdae…

MALICIOUS

PDF

44.4 KB Created: 2020-08-08 19:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ea9825abe3924a1d19e92d4a1e16177 SHA-1: 3d1ae2627dd9e1d7eae712c14cbdec0fa396e29a SHA-256: afaf5144f706cdaebcf5a18ad65a384425255308951b186b0b82f7bbc73c29cb
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a specific malicious redirector URL, suggesting a phishing or malware distribution attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the primary URL leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic shows a large number of links, likely for SEO manipulation or to host further malicious content. The document body contains a call-to-action phrase, reinforcing the lure.

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://ttraff.cc/wb?keyword=information%20technology%20class%2010%20cbse%20pdf In PDF document text
    • http://xinid.nsp-sports.com/uploads/1/3/0/8/130874038/bomarukuwe_vezexoka_zuruzotonobe_sazotegivure.pdfIn PDF document text
    • http://files.crossfitforteustis.com/uploads/1/3/1/3/131398542/4ca136.pdfIn PDF document text
    • http://files.jjennahuppandrews.net/uploads/1/3/1/4/131454012/sudema.pdfIn PDF document text
    • http://files.tkubiak.com/uploads/1/3/1/4/131437977/wukufowanofag.pdfIn PDF document text
    • http://files.sanabriaphotography.com/uploads/1/3/0/7/130740221/9410587.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/1/0430/9866/9220/files/43027083170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/dimulelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/xetumifusozog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/sejakuwisupiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nepel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8813/3787/files/automatic_to_manual_conversion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6219/8425/files/mozugetozabajos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/46562518900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7453/4041/files/lazer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamawogedeveredu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/pijurotigodusoruwexore.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_off00006da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA6 5940 bytes
SHA-256: 512ff0dca8b26d67bad70dced6277fb00040de0e6018208889e833a78816f927
font_01_sfnt_off000081b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B8 10100 bytes
SHA-256: 7adb60326440ae5ce56f9b87552bb0e083010f6b6d63c0069c8dd74d6bc0d1b7