Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd25ca1ef73e6272…

MALICIOUS

PDF

32.2 KB Created: 2020-08-07 04:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8e6d0423c1ee91865f1fbcab1defc8c SHA-1: 02211b503a04a26ad4d7e1558ea6ea0a081978c6 SHA-256: bd25ca1ef73e627288f9f61a4baf86b7f29cb7cb3feaa9d07e475c379c5d88cd
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'pdf download' and the malicious URL. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to distribute malicious content or lead users to harmful sites. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=schistosomiasis+pdf+download In PDF document text
    • http://navixomix.alphaapparelky.com/uploads/1/3/1/3/131383297/vokazalatugomefon.pdfIn PDF document text
    • http://files.nowwwriters.ca/uploads/1/3/1/8/131856757/resunifoke.pdfIn PDF document text
    • http://files.sweetashoneyvinylcreations.com/uploads/1/3/1/4/131453436/1053835.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/1/0433/2421/1354/files/kisejodigebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/watch_teen_wolf_season_1_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4736/0414/files/chemical_properties_of_aldehydes_and_ketones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/barefoot_investor_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1118/6588/files/penenang_jiwa_imam_al_ghazali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/42571539876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/3121710994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/1459989822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/sejotexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1765/8780/files/52250384059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/wii_wad_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/34697978763.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 4

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_off00004323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4323 5496 bytes
SHA-256: adb9c1597cec110e214df6e34adf8ff9fc56ac8a5782c6e5b37ed8c09658e006
font_01_sfnt_off000055c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C5 8976 bytes
SHA-256: bfd900d872d1ea8952872db336bd33e064be0c4bb9b8bbd5aa7fbc533bdeca1a

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