Malicious PDF — malware analysis report

Static analysis result for SHA-256 de65d7193bc97af2…

MALICIOUS

PDF

43.1 KB Created: 2020-08-20 08:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18b89fc7d94d69c4e59a9f3545bf6dcd SHA-1: f9c3d7013937e047e443d55958cb68b44118c3b3 SHA-256: de65d7193bc97af2534c6ff8cc702ee11896b6c8f44d55f074b207e4012e2651
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=insert+link+to+excel+spreadsheet+in+powerpoint', which is also present in the heuristics. This suggests the document's primary purpose is to redirect the user to a malicious site. The presence of numerous other PDF links, identified as a link farm, further supports a malicious intent to distribute or host harmful 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=insert+link+to+excel+spreadsheet+in+powerpoint In PDF document text
    • http://files.mccordchapman.com/uploads/1/3/2/7/132710661/fesigo-solej.pdfIn PDF document text
    • http://files.lancastercountyconstables.com/uploads/1/3/1/4/131407424/b4715e4d19a17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/cultural_regions_of_the_world_geography_upsc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/autosar_bsw_makefile_interface.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5598/0445/files/3858618630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3724/5085/files/waganiwemamimulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/66429013900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/46645669760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/alphabet_song_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/11644405747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1358/4542/files/30514939292.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED1 5108 bytes
SHA-256: 7cafa688297f31f707e43261a6f62743c47aade032b27d6a7c64f544cdcd80c0
font_01_sfnt_off00007028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7028 9812 bytes
SHA-256: 963b0b17973cb24974e37d0c741f74792cacbb3c1dba83570f72c0809457db5b
font_02_sfnt_off000091c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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