Malicious PDF — malware analysis report

Static analysis result for SHA-256 925af2d23eae5d70…

MALICIOUS

PDF

41.3 KB Created: 2020-08-11 03:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6de2222e2500f8a4c703bfbf217ebaa SHA-1: 0fcc88650162bd97857074d2ba502a24b2847772 SHA-256: 925af2d23eae5d7012293ac8ceaea569f03097055a9e78058e6d51b4d1b8727d
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a spelling exercise PDF. The document body, though heavily obfuscated, contains the target URL. The PDF also hosts a large number of external links, many pointing to Shopify domains, likely as part of a link farm to improve SEO for malicious content. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=alphabet+spelling+exercises+pdf In PDF document text
    • http://files.gwpskidszone.com/uploads/1/3/2/7/132712661/2197540.pdfIn PDF document text
    • http://tigaso.minermatters.com/uploads/1/3/1/0/131070374/lolisebijufaver.pdfIn PDF document text
    • http://datutepob.haley-grace.com/uploads/1/3/1/4/131453177/7415661.pdfIn PDF document text
    • http://files.waynefreck.co.nz/uploads/1/3/1/6/131607110/lifukitabijosaf.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/1/0432/3550/8387/files/physical_chemistry_acs_exam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/luvuforagilofaxom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/77839334869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/aeneid_fitzgerald.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/92261946563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2574/3515/files/84777601897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/nutevoterubanuweboxugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/xubexalenap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/apple_fake_email.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/bikedarevik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7555/0873/files/my_love_my_bride.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0053/6986/files/12845213478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/nexuvukeveselelolisuvem.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6216 5616 bytes
SHA-256: 382c6bda120a64e4c5a3fc038f2a3cc45e06089ecce9f20611961fe070c28d9b
font_01_sfnt_off0000751a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751A 10288 bytes
SHA-256: a0030b13090499658be1dcacdd40c5f27b3ee23e7c1fbc24a7518f83561da33f

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