Malicious PDF — malware analysis report

Static analysis result for SHA-256 9513c793b876272f…

MALICIOUS

PDF

43.9 KB Created: 2020-08-05 05:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17da796d9962d0f97493ff70bebc3afc SHA-1: 827ffc90f5a980e7375b58a65c64ed9b5f4c095d SHA-256: 9513c793b876272f1778f8a5eb4c2fa131a73b67c0a29a7f7126e70a5c1acf29
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting other PDFs, and one critical link redirecting to a known malicious URL. The primary malicious link is https://ttraff.cc/pify?keyword=atos+processuais+novo+cpc+resumo+pdf, which is designed to lure users into downloading further content. The ML classifier strongly indicated maliciousness, and the PDF structure itself is indicative of a link-farming 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.cc/pify?keyword=atos+processuais+novo+cpc+resumo+pdf In PDF document text
    • http://files.thenewstaketwo.com/uploads/1/3/1/4/131407734/soperorawese-kidufujikol.pdfIn PDF document text
    • http://files.faithfullyrestoredwomen.com/uploads/1/3/2/7/132740498/ragelupijuxunege.pdfIn PDF document text
    • http://files.taillacdobermans.com/uploads/1/3/2/8/132814929/mifowaxe-ronewuzezikobe-gebenivijo.pdfIn PDF document text
    • http://files.eric-goodman.com/uploads/1/3/1/8/131857213/5880873.pdfIn PDF document text
    • http://files.kulitjerukbali.net/uploads/1/3/0/7/130738955/1448541.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/1/0435/3913/6661/files/fowumip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/87665456752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/zezeluxoxuwelitex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/ninujosivowovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/cch_chuyn_sang_nh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8787/8549/files/fallout_3_railway_rifle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/natuzekemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/8984102455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/36301784903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/makikuset.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B40 5316 bytes
SHA-256: 9f3add298f8252a457d8ec73168281531aef432b47a40b0fcd90a5eb2e1b3b7b
font_01_sfnt_off00007d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4A 11808 bytes
SHA-256: 4489f0a1839e1f406c3166f6533f35279a658047ba8f3b759162637b3580783a

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