Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da533778280d6ab…

MALICIOUS

PDF

44.4 KB Created: 2020-08-03 10:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2ad3f9433fe1076c5deb5b64401eea9 SHA-1: cd8fa74e80ec261b0970a0031180fe58698780b8 SHA-256: 5da533778280d6abfdaed6f58f71a1f97a55759cc79f9a7597166a49683ab5e9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links designed to create a link farm. The primary redirector URL, https://ttraff.com/pify?keyword=paul+richards+krdo, is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting a lure to trick users into clicking through to malicious sites. The ML classifier also strongly indicated 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=paul+richards+krdo In PDF document text
    • http://files.risehairinc.com/uploads/1/3/1/6/131637546/7290640.pdfIn PDF document text
    • http://files.wanderingoaksrvpark.com/uploads/1/3/0/7/130740087/kunewiwapis_zetujenuv_jewizuwete_genekuvimolufuj.pdfIn PDF document text
    • http://files.greenlabelhome.com/uploads/1/3/1/4/131406840/9590574.pdfIn PDF document text
    • http://files.rockfallsrevolution.com/uploads/1/3/1/6/131606069/miwezu.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/1/0430/4021/1105/files/jinoxudenewifadorod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5083/4847/files/tijazesasinelovuresej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/61153794086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0107/0247/files/ropose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/76735457029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/81698243971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/fatal_no_such_remote_origin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/3360488319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/tapazojijubafubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/79579732555.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 7

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_off00007082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7082 5092 bytes
SHA-256: 99a47e4752556542b228db63eb7e116e0f6252901badc690a8a549a18759dcc0
font_01_sfnt_off000081c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C5 10248 bytes
SHA-256: 7ae47154752c3673a929116e1375755e50602f63de4ab2bf0a1c8cd5c1b71bc9

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