Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77a0297b72005ec…

MALICIOUS

PDF

39.3 KB Created: 2020-07-30 06:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 130a582cdda6c00c0279c36f40138b1f SHA-1: 8040e72b5fdda019c52bd13c3d02aec21226afb1 SHA-256: c77a0297b72005ec4de27b0f4d914a0639c359019c42800e559eb997d40a5ae1
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised with a keyword related to document conversion. The document body, though heavily obfuscated, appears to contain metadata related to wkhtmltopdf and document conversion, reinforcing the lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute the 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.cc/pify?keyword=convertir+un+documento+de+pdf+a+word+gratis+en+espa%25C3%25B1ol In PDF document text
    • http://files.adultedresources.com/uploads/1/3/1/6/131606127/9b158.pdfIn PDF document text
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdfIn PDF document text
    • http://files.lecheminantbooks.com/uploads/1/3/1/3/131380558/zagezefuxatojeraz.pdfIn PDF document text
    • http://files.erinzak.com/uploads/1/3/0/7/130776795/286633.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/1/0437/3191/0810/files/26639647668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7222/4421/files/89640626204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/tizodezuxulaxarukotiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/23474898697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/28832887880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/78983246474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/67135950017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/17270993363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8943/6580/files/letolutipupugewurejafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4827/2023/files/widugaxeviragila.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_off00005763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5763 5744 bytes
SHA-256: a318e2017d0868757500f3094e0519f0c3b763958c73a86c19916ff29a049bdf
font_01_sfnt_off00006ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB0 10536 bytes
SHA-256: af3990746d2b65c8ebde377e9ddb0ce35060ee5a860a606f4de900fb31191209

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