Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b495be125fa5a3…

MALICIOUS

PDF

43.7 KB Created: 2020-09-07 18:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e239246392ff9f01008c426557b8db57 SHA-1: 7f786cd1fb473fb0f93ada94814adc1f0b41adf2 SHA-256: a7b495be125fa5a3ba5198bcb3037b8aa2226fafa90fc13077a9fdd94434a034
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated but contains the primary malicious URL, suggesting the PDF's purpose is to lure users to malicious sites. No scripts were extracted from this sample.

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/wix?keyword=brittainy+c+cherry+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/02af14_fdeaf53cf86446038e9cec2c88e57e7e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ade13_5d4d15a50a384c638a339ebc3c72a18c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cf392_6da2b1aabd024e9a8772f0d1672dab05.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de02f3_4dda3714d76d4dcaafdcebfc0c5ca989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/dozozotipukutad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7981/8661/files/vupazujarerisen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9566/8376/files/dowalimemumubumelej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5107/7032/files/minecraft_1._7._10_resource_packs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2152/3349/files/55039453058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9437/4555/files/business_english_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/siperitefututobozat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/fowimimijasutowimu.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DC 5184 bytes
SHA-256: ca79c856194910cefb2a30bb8e26228105a7116e6f8369f196a66baaf56bd3f5
font_01_sfnt_off0000757e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757E 1648 bytes
SHA-256: db10b07aa1ba911afaf060b12e2cde8c70dbbf9941f30369d108722010ce9547
font_02_sfnt_off00007dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC8 10600 bytes
SHA-256: bc078eb84c4a22e1c2afd480cc115c0c2bd4753c14694d05660617d329972685

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