Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c13dbdf94f4ea8…

MALICIOUS

PDF

101.9 KB Created: 2020-08-11 13:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e2649aa0070fc2a4bb54b3b2ad409d0e SHA-1: 6d8c90aaffd11d02a706fff1c070824b175987e6 SHA-256: 58c13dbdf94f4ea877927b0ffa90579bf2358cc33f29c3a659a3e54bfb1fe2b4
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=manual+de+auditoria+de+sistemas+informaticos+pdf'. Additionally, another critical heuristic indicates a PDF link farm, with the first URL being 'https://cdn.shopify.com/s/files/1/0434/0652/4566/files/wetirotilomipazejoz.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain the malicious URL.

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.ru/pify?keyword=manual+de+auditoria+de+sistemas+informaticos+pdf In PDF document text
    • http://files.pukasurf.com/uploads/1/3/1/4/131437983/ruruvowoma_morojuzimo.pdfIn PDF document text
    • http://files.angelahollanddesigns.com/uploads/1/3/1/4/131453924/3253511.pdfIn PDF document text
    • http://fikoka.infinitely-natural.com/uploads/1/3/1/1/131164312/c3ab280ac299076.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/1/0434/0652/4566/files/wetirotilomipazejoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/dba_ciencias_sociales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1637/8773/files/stages_of_meiosis_1_and_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/12795868463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54313135065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/86608276552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/soduvazififawedoveda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/acpi_atk_0110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/btec_level_2_first_hospitality_student_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1577/7954/files/fapolitelijonabikexetij.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 4

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_off00014fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FCF 5304 bytes
SHA-256: 62bd9c4a11234bed075b42d93c453b1ad93edb8cb3084bf6c0c808c51a75e919
font_01_sfnt_off000161c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161C2 11748 bytes
SHA-256: 9d0af427fd732ea7febd04c0019fd5c42993254e8d67e9e225d058ccea91b827

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