Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c87d56b4be3fdaa…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 15:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f7e1beeff5d0ff444d6f7bfb09e6664c SHA-1: b6aeaf00436332aa3e71ca3c60255010f3c2cfad SHA-256: 7c87d56b4be3fdaa3993de045056451a94769bfaa2e34c4f40c7b377825dd65e
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the primary redirector URL and several Shopify URLs, suggesting a lure for free downloads. The ML classifier also 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.ru/pify?keyword=spanish+ketogenic+mediterranean+diet+pdf In PDF document text
    • http://files.unknowngeniuses.com/uploads/1/3/2/6/132696604/4590500.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/1/0430/3765/5191/files/bf-_888s_frequencies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5766/7487/files/17432410693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8691/3439/files/2766983693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/donuromabito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/depevuwevosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/bosch_ecosense_dishwasher_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5019/5354/files/biological_weathering_of_rocks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6766/2490/files/bbs_4th_year_result_2076_with_marksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/88733329200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5232/7324/files/nutrisi_hidroponik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/65714733227.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 1

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_off000064b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B8 5704 bytes
SHA-256: d6ff74118f53c9071bdadb142f0895347da3eb6021eaa9f00b58a9935af5792f
font_01_sfnt_off000077ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EA 10232 bytes
SHA-256: f1f43afeece63eee381c32f7b252489f250e0080c68ef4eccc6af9e2227ae3c4

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