Malicious PDF — malware analysis report

Static analysis result for SHA-256 5374c1ec71d70b61…

MALICIOUS

PDF

41.0 KB Created: 2020-08-18 18:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86bc9fa34dbe46af0fba025809b8b038 SHA-1: 17648282afe1d5e0e8a0efd6a3cecd1235d4ab8c SHA-256: 5374c1ec71d70b61b4eacb902b8b1f0afdb08ca19824f2dd6c62b2211497e3e3
162 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cisco+vpn++free'. This URL is likely part of a phishing campaign, attempting to trick users into believing they are accessing legitimate Cisco VPN resources. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on cdn.shopify.com and other domains, suggesting a link farm designed to distribute malicious content. The presence of multiple embedded URLs and the redirector link strongly indicate a phishing or social engineering 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.ru/pify?keyword=cisco+vpn++free In PDF document text
    • http://pejozo.scafone.com/uploads/1/3/1/6/131606490/2cd647be.pdfIn PDF document text
    • http://zabog.creativeforcecoaching.com/uploads/1/3/1/4/131438096/cc9b976e58c8.pdfIn PDF document text
    • http://files.7lakesboatrentals.com/uploads/1/3/2/6/132681156/9664124.pdfIn PDF document text
    • http://files.reveil-corporel.com/uploads/1/3/1/4/131483138/6784639.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/1/0432/4543/7083/files/32162143994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/gadul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/71440715878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6547/3189/files/automobile_engineering_subjects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/bufexesiputa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/mefexeriguxines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/logistica_y_cadena_de_suministro_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0699/6134/files/organelos_de_la_celula_procariota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3788/8410/files/einstein_theory_of_happiness.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_off00006547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6547 4732 bytes
SHA-256: 11cad3c1ffde169c4ef623784de6e46391604c883c41b3a4b8423cb98e7b65e9
font_01_sfnt_off00007577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7577 10012 bytes
SHA-256: 14ea93955370c15dc8613c6eca26aa2a39cd1cf0b8a5c7acf6e47047007b6a72

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