Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8b9d9bd642d897…

MALICIOUS

PDF

39.5 KB Created: 2020-08-18 14:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e78273d3f28058147e00b09b9d0a09ac SHA-1: 881b57daf4b860ea9d1512107b690097eb8e2c36 SHA-256: da8b9d9bd642d89787a1bf4fca36d019b2d77fba3c3d171dc5e56b3f9c4d7f2d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Pcb design rules' and the malicious URL. The primary malicious URL, 'https://ttraff.com/pify?keyword=pcb+design+rules+pdf', is identified as a redirector, likely leading to a further stage of the attack. The presence of a large number of external links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious 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.com/pify?keyword=pcb+design+rules+pdf In PDF document text
    • http://files.divinaartwork.com/uploads/1/3/0/8/130813859/kizumuviz.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/1/0429/6094/5305/files/oil_centrifuge_working_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5614/0186/files/counterparty_credit_risk_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/putenofufiwaxaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/vuzulakaloparogefatiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0584/4390/files/carte_blanche_credit_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/54949985355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/35443488683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/visuvotapuvegunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0958/6853/files/pegolib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6046/0706/files/rizisodefatabadek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/children_s_tylenol_dosage_chart.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_off00005f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F78 5252 bytes
SHA-256: 1b3bd0b7b1571d3ac1d8edec0ab1289b52d28170801310da746ecff60e348b9d
font_01_sfnt_off00007159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7159 9488 bytes
SHA-256: b2a9abbf543eb7ae137798badbda2d49ca414ac05b9771b8b93b7b9ca7dcb7c6

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