Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd1271583199c02…

MALICIOUS

PDF

44.9 KB Created: 2020-08-07 11:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff5ef606e7f969cb87bdbcb0227dc10d SHA-1: e4b93f60346e4e7af8140fa13adfef1eadd81edd SHA-256: 3cd1271583199c021d34dd3097e75b813c93a44bd7edcd839c3694491b74d8cf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a prominent link disguised as a system update notification, directing users to a malicious redirector. This link is intended to trick users into believing they need to update their Android operating system, leading them to a potentially harmful site. The PDF also hosts a large number of other links, many of which point to benign Shopify URLs, suggesting a link farm or SEO poisoning tactic to obscure the malicious redirector.

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/wb?keyword=manually%20update%20android%20operating%20system In PDF document text
    • http://files.numeracyteacher.com/uploads/1/3/1/3/131380029/wuvuwojadubeta_mivepemadiwuj_fefagifulif_duxidiwesexid.pdfIn PDF document text
    • http://files.msbutchersclassroom.com/uploads/1/3/1/0/131069781/tipuv.pdfIn PDF document text
    • http://files.agorapublications.net/uploads/1/3/2/6/132682570/4da5af8.pdfIn PDF document text
    • http://files.joanrobertaryan.com/uploads/1/3/0/7/130739251/7910871.pdfIn PDF document text
    • http://files.ruthyleephotography.com/uploads/1/3/1/4/131453990/fewuzuv-zixadabul-nomenaru-libina.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/1/0428/6906/3836/files/nanakugiwem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4971/3817/files/farepuwafufewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/hayward_sand_filter_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/28543602445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6305/8333/files/78541477940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8307/0630/files/lufovosagududonux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/dbt_skills_training_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9642/3080/files/tokagamemoxoxedap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/download_lucci_56_nights.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/tavujoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/riteruxovamikulaguwenu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000707e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x707E 5384 bytes
SHA-256: cdd299d5282440b763bd6889933753145f5be65fc1d8cfbdce66906295ed6f26
font_01_sfnt_off000082cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CD 10288 bytes
SHA-256: 67147e2d4a885705d0736e38418cc7876df082e421bd4ad748d6d0daf6af790c

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