Malicious PDF — malware analysis report

Static analysis result for SHA-256 98566a817a9a2b58…

MALICIOUS

PDF

56.6 KB Created: 2020-08-05 00:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b673ce5e59a47e3598ec67b3dbbb59a6 SHA-1: 870ee8bb5eac60d195ca279e2bb11502a806e5e4 SHA-256: 98566a817a9a2b586bd33deba4e13b21020cf29e12999ac76e652a023240ff4e
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading a file, and the presence of a 'download button' heuristic further supports this. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.
  • 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.com/pify?keyword=alfabeto+japones+katakana+pdf In PDF document text
    • http://files.thefixstgeorge.com/uploads/1/3/0/7/130775295/7088733.pdfIn PDF document text
    • http://files.ohiospfrx.com/uploads/1/3/1/1/131164129/sadolugi.pdfIn PDF document text
    • http://files.loupcountyschools.org/uploads/1/3/1/3/131379117/6e1b1.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/1/0434/8579/0365/files/26598052538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/vavabivor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5826/4229/files/discord_different_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/84265923201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/30032073778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/dejef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/molubalijajazibumetabok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3366/4408/files/61694464981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7361/8599/files/31498434641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/xefikolepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8723/files/borasipepenut.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF3 12856 bytes
SHA-256: d107f59f6d4ef393e45c0351d637e378a86585d93fc1daab37989916610e388f
font_01_sfnt_off000097e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E0 5208 bytes
SHA-256: ddf3c19ba06452afe49457c3e333cf85e79add90564f726c4076ab1a4aae793a
font_02_sfnt_off0000a9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B2 14024 bytes
SHA-256: 8384f3bb03f53bc24f1e551fc1b2289b57a6c417c206705241d27a815fd813b6

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