Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb94d0f3dbe23684…

MALICIOUS

PDF

42.5 KB Created: 2020-08-15 22:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5733a5fd121dbfe0ac78df928606f79e SHA-1: 0827f6e990d27b3df54f625af34a6a9b07135eae SHA-256: cb94d0f3dbe23684caba7d85b073d26776f50b25467d9b329e65472e6e2c4959
202 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic indicates a malicious redirector link, which is also present in the document body. This suggests the primary goal is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload delivery.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wb?keyword=phases%20of%20disaster%20management%20cycle%20pdf In PDF document text
    • http://files.sergey-gusev.com/uploads/1/3/0/7/130775903/3663398.pdfIn PDF document text
    • http://bawowepew.familypharmacywalnutcove.com/uploads/1/3/0/9/130968996/vifunal-faxixiburoka-vuvinaxe-puxunu.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/1/0430/6753/9623/files/tubotijulog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1438/1980/files/63421664299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/gasunaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/24600560655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/arduino_string_to_char.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/global_automotive_industry_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/atrahasis_epic_full_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/31726624767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/44438280107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4363/2805/files/free_online_editor_merge.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 2

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_off0000687c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687C 5672 bytes
SHA-256: 21f4a6420109065bb338781ac9718ca66ac2bba2d592d152ce2794c6432bb5a5
font_01_sfnt_off00007ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA8 9860 bytes
SHA-256: 17839a620b06187510dd1c01d77ae2f4f12bff04dcf931e4dd79dc1e5f75c814

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