Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf02ec1bd3b2a6c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-04 16:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1d39a82ef9ae99a370639421e30bcf6 SHA-1: da21e46a57a19527a8c3b5a13a011630682e45e2 SHA-256: 4cf02ec1bd3b2a6c67eddfb177f603f2fca93cac9102dee0a0837ec8b55c3b96
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a utility for merging PDF files. The document body, though partially corrupted, contains the same lure text and the malicious URL. The PDF also hosts a large number of external links, many pointing to PDF files on Shopify domains, suggesting a link farm or SEO manipulation tactic to mask the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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=r%25C3%25A9unir+plusieurs+pdf+en+un+seul+document In PDF document text
    • http://files.chemtutorsg.com/uploads/1/3/1/3/131398507/wosokagar.pdfIn PDF document text
    • http://files.afmemphis.org/uploads/1/3/0/9/130969452/gixovuxosojerosizi.pdfIn PDF document text
    • http://files.elementaryschoolcounseling.org/uploads/1/3/1/3/131379949/1939712.pdfIn PDF document text
    • http://files.ecocaregreen.com/uploads/1/3/1/3/131384468/pavefofat.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/1/0438/2123/6381/files/serizasidaradegalezigej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2528/5791/files/84830884982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/davamebedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5956/9055/files/irs_form_8917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9628/0993/files/us_address_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/rapudaxibafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/zutazakabetaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/jumolimonovuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9947/2550/files/minecraft_usernames_and_password_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7467/3050/files/87725758117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/85166854585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9573/4937/files/futonuxaxaxogemoxuvugus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/vewijigusiwuraxegis.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6290 5240 bytes
SHA-256: 6f205117eec1f81c0b371c86ceca1762bbf9a59655bf669bd3215eb85bee4d22
font_01_sfnt_off0000740d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740D 11672 bytes
SHA-256: d226a759e7ba2dcc4c3e2686e541b216f36b5803056361ca5df721b0c441fe1d