Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb8f6435234b5dc…

MALICIOUS

PDF

47.3 KB Created: 2020-09-01 05:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31dca81c782e0e4124f2b3ca1b491d21 SHA-1: c78f616a7f6a82e5f1ef279c07a73fec77da5ff3 SHA-256: 5bb8f6435234b5dc2a1f2b0c6735ac8523542587b5e0853cc36e7ef44a82a940
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document contains numerous links, many pointing to benign Shopify-hosted PDFs, but one critical link directs to a malicious redirector. The heuristic 'SE_MFA_LURE' indicates the document is designed to harvest credentials or MFA codes, likely through the malicious redirector. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/wix?keyword=vscocam+fullpack+ios+gratis In 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/1/0438/8667/4088/files/basic_rules_of_mathematics_algebra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4410/0506/files/50277587731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/lubelebefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3873/5512/files/simerifire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/46792251792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/zejolozadosukofuleje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/5520/2723/files/graphing_and_properties_of_hyperbolas_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/bujorepujusoxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5606/1850/files/48026533166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/physical_assessment_form_nursing_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/basic_knowledge_of_computer_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/vupojiporutazapeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12457093378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6272/8606/files/48253058110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/cours_anglais_bac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/31377022733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0E 5364 bytes
SHA-256: 284074352cacfb576eb0dfd38568f3daaa5c64e30b12658de4bf5216476c740a
font_01_sfnt_off0000803f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803F 2528 bytes
SHA-256: fc4021e369c7333a3e2698b65512cd5ca33aa0a3949f6c925ad90d66ca89f0ce
font_02_sfnt_off00008b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B70 10456 bytes
SHA-256: 0fa05645554549d74ab89c76e1e2d35b3cac2692d595de6a84babcd609efd531