Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff412a14de8399c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 11:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f9cebb471e35804c3fc540431e058fe SHA-1: 20a5afc58931b779e7121ab9e49f4da92a2c117c SHA-256: 7ff412a14de8399c128108e355c332b444062fbb197866392c91c1952fd996b5
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Linkin park crawling in my skin'. The presence of numerous external PDF links suggests a link farm or SEO abuse tactic. The ML classifier strongly indicates 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.com/pify?keyword=linkin+park+crawling+in+my+skin In PDF document text
    • http://files.alkalinerainforestherbs.com/uploads/1/3/1/4/131438190/runojot.pdfIn PDF document text
    • http://files.sjamediaarts.com/uploads/1/3/1/4/131454383/cf3000d.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/1/0433/5036/0232/files/liludesukibuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1341/3786/files/nuvudupinadivomuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/posemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4544/6044/files/11422963726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/gepazanabesituson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/37247792337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1892/7779/files/74873257639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/80873265215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0339/3694/files/stigma_definition_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/convert_excel_to_google_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.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 3

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_off00006374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 5452 bytes
SHA-256: 35ac197d0be068aa99372b311468506f26932c05ddd6a3b2ae565b549915795d
font_01_sfnt_off000075fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 10884 bytes
SHA-256: d4aa2e2ee4cc81388f5720fbe2389d7e0e0dd86028424b69fd7288b4fec5c585

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