Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db9cc989a87d974…

MALICIOUS

PDF

42.5 KB Created: 2020-08-22 08:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91b607baff5835f99276a7207335be58 SHA-1: 629393219632203ad5660463ee8537b295ffc2ee SHA-256: 4db9cc989a87d9742c13a2a0eaa3a4439e99e552df640c9ae23b4c7741e8a85a
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'Ptba financial report' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links points to a link farm strategy, likely for SEO poisoning or to host further 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=ptba+financial+report In PDF document text
    • http://files.littlegoblingarments.com/uploads/1/3/0/7/130775647/vegerunanaxib_vasifok.pdfIn PDF document text
    • http://fomesemen.eddiespaghettiart.com/uploads/1/3/0/7/130776088/398d87.pdfIn PDF document text
    • http://files.bowenislandrecyclingdepot.com/uploads/1/3/0/8/130813973/5893222.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/1/0429/3420/6631/files/kekuxojoper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6502/files/2018_calendar_with_weeks_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/60148379050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1646/8133/files/mikizizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3059/9064/files/breadtalk_group_annual_report_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/61495772007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/migoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/vorulujafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/wixerexigoreto.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 1

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_off00005e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8C 4972 bytes
SHA-256: 5bcaebf2019e6b801de4c8d80e0ba8d2d630fe1c3d6aa82a00abe0e427ac1387
font_01_sfnt_off00006f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F77 14156 bytes
SHA-256: 2cd74ce8bfb31e81d0e85e02b7843fdf1b4b5617a10c9c95351931700663e755

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