Malicious PDF — malware analysis report

Static analysis result for SHA-256 134fa351e802c0d4…

MALICIOUS

PDF

51.9 KB Created: 2020-08-25 11:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e290645713abd2f18d0930e56b0faf3 SHA-1: 84cfdaaa2b9a584be7b01a824ee5f57d32c79f95 SHA-256: 134fa351e802c0d4a31dac9b621814622bc343d364021c82cad75c02a8b7e495
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a password-protected archive lure, suggesting a phishing or malware distribution attempt. The embedded URL points to a redirector that, when followed, leads to a link farm of other PDFs, some of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=zarchiver+pro+apkpure', which is also flagged as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=zarchiver+pro+apkpure In PDF document text
    • http://files.zsystemsorder.com/uploads/1/3/0/7/130739503/1818911.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/1/0430/1714/2433/files/79382100511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/3375025395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/84608771998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/sibiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7355/2028/files/4118077381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/0234/2037/files/economic_and_social_issues_for_rbi_grade_b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/brother_printer_driver_singapore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1908/2655/files/vugesifevawafutos.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000787e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787E 4892 bytes
SHA-256: 848407a0c875c82d4c903e3b69cd449b35ce410169e42b74d83679d13693c13a
font_01_sfnt_off00008923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8923 10356 bytes
SHA-256: 87374420af6443228141ae00c03e3a312809e717331548e905a4a4174476a72f
font_02_sfnt_off0000ac9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9D 16468 bytes
SHA-256: 75e946b225aa6b4b55ab3e5a518bfcd20061ab3d93a9d21aaf366d4e54857459

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