Malicious PDF — malware analysis report

Static analysis result for SHA-256 21aa38026871a82f…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 12:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c50fa26ce62f0c286de9c9d73642a730 SHA-1: 6a5d2aa0759a106cc6b060b867bb717f0e525528 SHA-256: 21aa38026871a82f2057820c9e7ea981d0acc7727fa19d43f2ddd156fca8cec8
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking Shopify URLs, suggesting a link farm designed to obscure the ultimate malicious destination. No scripts were extracted from this sample.

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=alimentos+ricos+em+fibras+soluveis+pdf In PDF document text
    • http://files.artsimaginarium.com/uploads/1/3/1/4/131406717/nozuziwel_wizit.pdfIn PDF document text
    • http://files.vikingspe.com/uploads/1/3/0/8/130814758/kevitovexiratekajila.pdfIn PDF document text
    • http://files.jeffbrawn.com/uploads/1/3/0/7/130739945/1a587e.pdfIn PDF document text
    • http://files.tumbleweedsandnotions.com/uploads/1/3/2/6/132696155/16c82eeb9.pdfIn PDF document text
    • http://poduwome.historicinnskennebunkport.com/uploads/1/3/1/6/131606289/4278162.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/1/0431/9143/5422/files/83478774752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9146/files/losudito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11383010616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/38186844038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/1788/9960/files/zugififakunaruliwuximu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/26588697878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3948/2278/files/kopapuxazubisurelowez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/84199415009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/mivodalus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5362/8062/files/3906394718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4803/2663/files/bank_interview_questions_and_answers_for_freshers_free_download.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_off00006218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 5488 bytes
SHA-256: 8acba5bb8f9ca015105f1021014ff692616e024fcf72510df6abd3b32318dd90
font_01_sfnt_off000074a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A6 12156 bytes
SHA-256: bfb0fbf7be89792ed5058071d1c69278402628d7f4cd36145c50264cd4fcee31

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