Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5be3c03176b6b76…

MALICIOUS

PDF

43.6 KB Created: 2020-08-18 15:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cec8f72f47c0530552ced8c16aa5e838 SHA-1: 6d0857d84bd9ccaeea02beedee311eb1e985e5d6 SHA-256: d5be3c03176b6b7691eca239f80214db1448fb221e52d1dbd0e44bffd78f4c4d
210 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains heuristics indicating it is a malicious redirector and part of an SEO link farm, designed to lure users with fake download prompts. The embedded URL, https://ttraff.cc/pify?keyword=android+studio+for+windows+7+free, is a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Android studio for windows 7 free' and a URL, suggesting a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=android+studio+for+windows+7+free In PDF document text
    • http://files.precisionhvac.us/uploads/1/3/0/7/130739747/gikigewuj.pdfIn PDF document text
    • http://files.bethanylutheranrlf.com/uploads/1/3/1/3/131381819/sizumomonogup.pdfIn PDF document text
    • http://files.smithpoolservice.com/uploads/1/3/2/7/132740620/gewulubiz.pdfIn PDF document text
    • http://files.jakyoga.com/uploads/1/3/2/7/132740405/d4480fd1.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/1/0430/3133/0969/files/58318523286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3882/5883/files/63542116260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2982/1597/files/statistical_data_collection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/4240507416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/calendrio_agosto_2020_para_imprimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/15_minutes_to_a_better_interview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/ladowexokawakizuvome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/vizopekefodem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/44613862951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/34950218395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.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_off00006e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E32 4820 bytes
SHA-256: 975d564494aee40b6b6bc929d6d923358bb09f6995da59bdc21715406b85626f
font_01_sfnt_off00007ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC1 10144 bytes
SHA-256: f4b0b1ed495d2e4e0e58d72ac970251084c6f02eae55ecdbfac6d57b5cd6ee1b