Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ea52b434c89e65…

MALICIOUS

PDF

60.2 KB Created: 2020-07-27 18:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 04861efcb88fdfaa755d536d80a60e70 SHA-1: cbb195c1df75c4819a3ea4d8a48fb55c1c67b350 SHA-256: 51ea52b434c89e65992616437ffcd185f0bafeaf03ef9a99b1ae07b903049495
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a large number of external links. One of these links points to 'ttraff.com', which is identified as a known malicious redirector. The document body appears to be obfuscated or corrupted, but the presence of numerous links, including the redirector, suggests a phishing or redirection attack.

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=slow+hip+hop+instrumental+beats+free In PDF document text
    • http://files.leilaamani.com/uploads/1/3/0/7/130775646/9569233.pdfIn PDF document text
    • http://files.gilescartwright.co.uk/uploads/1/3/2/6/132683463/015dd5871f88a6.pdfIn PDF document text
    • http://files.adobeforfashion.net/uploads/1/3/1/1/131164046/1642196.pdfIn PDF document text
    • http://files.funnyjackmusic.com/uploads/1/3/1/3/131398286/8686336.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/1/0428/9835/8432/files/59022585862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/83738561323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/verezolarowivifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/kujatirubelugimiriruxon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/7447970689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/89426475249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/luxitoduxekavorel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/78246486583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/32822955959.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 5

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_off0000a0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B1 5356 bytes
SHA-256: e4195a9ed0591fcfe5e7a12b51ee45b6b0e674f27d4bf0274786c090339fc8eb
font_01_sfnt_off0000b2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B8 15056 bytes
SHA-256: 52a4bd807a978aac5b91f327132a73db4617d980edb652826572c868f30716c4

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