Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da36da9fed51097…

MALICIOUS

PDF

36.3 KB Created: 2020-08-18 14:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a823b4cf6a2a21acb5d3515b69751eab SHA-1: 84dd188ebe6d3369c350f6a4c1114553c1a86a15 SHA-256: 1da36da9fed51097f4c114d263e64f8d18704882ac8e87c84ecf0b9c1f298838
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a keyword related to hardware drivers, suggesting a lure. Additionally, a PDF link farm heuristic indicates the document is designed to host numerous external links, likely for SEO poisoning or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=bios+hp+elitebook+8460p In PDF document text
    • http://rapedef.tracyeducatorsassociation.org/uploads/1/3/2/8/132816202/616428.pdfIn PDF document text
    • http://files.stillpointatbeckside.com/uploads/1/3/2/6/132695213/pupidofisejebina.pdfIn PDF document text
    • http://files.breathewithlauren.com/uploads/1/3/1/4/131437351/424db3.pdfIn PDF document text
    • http://files.matakanacommunitygroup.org/uploads/1/3/1/4/131453370/bfaed5.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/1/0432/2361/3595/files/majokakasopumomeset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8247/1837/files/94485262691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/33780149595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/tofarurutora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/renenudavijufefoposariva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/handbook_of_biologically_active_peptides_second_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/rufoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/dofiripuredudovata.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 8

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_off000041ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41BA 5112 bytes
SHA-256: acd39ea9a6ec981a6f64f5c8093fffa73e160ff0f92b5a1ec7d830f08c074c3e
font_01_sfnt_off00005324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5324 10328 bytes
SHA-256: 7173bea8db163e70d4dc87f416f3a612b544e8b174c705de96b295a3e9815fcd
font_02_sfnt_off00007685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7685 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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