Malicious PDF — malware analysis report

Static analysis result for SHA-256 df4e50b0c40bc5f6…

MALICIOUS

PDF

41.4 KB Created: 2020-08-26 03:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0143f17ac9798afd79a586a7c3aeafc SHA-1: c9c343b1e87eec591ca063859fb0ad061b1a9370 SHA-256: df4e50b0c40bc5f62fd9b9a1056137bd81869a4dfbc78aa9fdde08a16cf6c72a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be a lure for free sheet music, which then redirects to a malicious domain. This indicates a phishing or scam attempt using a link farm to distribute malicious content.

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=easy+disney+songs+piano+sheet+music+free In PDF document text
    • http://files.devoncoast.co.uk/uploads/1/3/2/6/132681969/jilisivevawaxebok.pdfIn PDF document text
    • http://files.carsontidwell.com/uploads/1/3/1/4/131438249/mumiv.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/1/0428/3708/2271/files/58861695082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46824776831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/45439074565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/nepofaketuvogudetakegalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/zudazumina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4381/3538/files/jorekaran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4266/6656/files/keto_made_easy_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6821/8780/files/cash_book_in_tally_erp_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E62 5596 bytes
SHA-256: 2bd628f532349557cd18d7a065ae4743bb660f66692d22b16103952e3dc788f6
font_01_sfnt_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 9932 bytes
SHA-256: 4b2e5acf8ed5df5b7b8e7080a7fa1c4354fa81ad421fcc60dfc45b5ec92ff0fe
font_02_sfnt_off0000835a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 16232 bytes
SHA-256: b2cbfceaf44fc4a56d1321c5677f125dfbde6a5f8c873b6a17361dd7c2aa5302

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