Malicious PDF — malware analysis report

Static analysis result for SHA-256 2351ba053b7a7c4d…

MALICIOUS

PDF

41.9 KB Created: 2020-08-19 00:39:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66602257003b90915fc489d853e040b8 SHA-1: fcfc8086b1e6594a8e74101da4cc2ba9d1a8f74e SHA-256: 2351ba053b7a7c4d23da4110f747c2197b50889dbade7f0964c275712a09364a
162 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF SEO link farm heuristic, embedding numerous links, with the first identified link being to 'cdn.shopify.com/s/files/1/0432/3452/5352/files/pikovax.pdf'. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to drive traffic to potentially malicious or SEO-manipulated 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=pdf+files++as+html In PDF document text
    • http://files.generationbusy.com/uploads/1/3/0/7/130775592/6859983.pdfIn PDF document text
    • http://manumabup.ombodieslondon.com/uploads/1/3/1/0/131070450/2115868.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/1/0432/3452/5352/files/pikovax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0436/1884/files/jedibeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9036/9959/files/basic_air_conditioning_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/66922869277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/xokopakinatixelinusut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/43360715755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/ada_lovelace_ielts_reading_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/fefuwizowosadidawat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6236/1245/files/49460799829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/76514762606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/72118243361.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 2

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_off000066f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F6 5052 bytes
SHA-256: 121a2fbc56d02d31c014da5049f0b2535d5112c9d1036211ecf017193039cf8b
font_01_sfnt_off00007806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7806 10192 bytes
SHA-256: 8cdcd1175cf3272f553e20f127c874aaeb67765fc4f1ee7a76dd287c829f07ce

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