Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5d03a4c8bad7f9…

MALICIOUS

PDF

49.0 KB Created: 2020-08-17 17:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2d3c775a1ac266f08741dcb8224c5cc2 SHA-1: 7477f0811e8117b64b9036d4a388f27bfdc9ad94 SHA-256: cf5d03a4c8bad7f9e4df66039296af28cb20da3c8c301d3960e60b4cd7d4a59a
234 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to "children's story books pdf" and includes the malicious redirector URL. The presence of a "password-protected archive lure" heuristic suggests this PDF might be a precursor to delivering a password-protected archive, further indicating a malicious intent to bypass security controls.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/pify?keyword=children%2527+s+story+books+pdf In PDF document text
    • http://files.barngoddesspahrump.store/uploads/1/3/0/7/130776749/juxoxonekis.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/1/0431/2940/5600/files/34695656987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/organelos_de_las_bacterias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5123/7032/files/tuvobipukes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2047/4779/files/parasitic_diseases_of_animals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3778/5240/files/free_background_pictures_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1892/7778/files/35899448579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/zafomesudopukuwilipabogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/14847450434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6975/5812/files/60460959238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/dirunifimekaz.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_off00008342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8342 5164 bytes
SHA-256: ae53580cb869e9b887bb314a1fd4436fa45bc3a12e40aac8e287d0c3c9e3ec64
font_01_sfnt_off000094ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94CE 10088 bytes
SHA-256: 671379fae738a43bd8cbef540cb1fb89ac5de79cf30b1428eb37a423b78b35c1

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