Malicious PDF — malware analysis report

Static analysis result for SHA-256 4863d6605b831da7…

MALICIOUS

PDF

48.5 KB Created: 2020-09-19 08:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ef33cdc67dd76c20a0877f3369b2b21 SHA-1: 1b20ab013da0f663145840e1a182675574fdf3f8 SHA-256: 4863d6605b831da7cacdc7f4ad45a48f3962d5f6414bef4e51e43525402e6599
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous embedded links. One critical heuristic firing indicates a link to a known malicious redirector, specifically 'https://ttraff.me/wix?keyword=eiji+yoshikawa+musashi+pdf+deutsch'. Another critical heuristic detected a large PDF link farm, with many links pointing to external PDF files, likely for SEO manipulation or to distribute further malicious content. The document body contains garbled text and some of the extracted URLs, reinforcing the malicious nature.

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.me/wix?keyword=eiji+yoshikawa+musashi+pdf+deutsch In PDF document text
    • http://files.westrivermontessori.org/uploads/1/3/0/7/130739379/xadotekujeti.pdfIn PDF document text
    • http://files.kansascityrosesociety.org/uploads/1/3/1/4/131408798/vofad-xomimupimiw-juvuxekajup.pdfIn PDF document text
    • http://guradika.rodsartgallery.com/uploads/1/3/1/3/131379312/zoretusijeneja.pdfIn PDF document text
    • http://files.muonhunter.com/uploads/1/3/1/6/131637021/3613067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/firamesaxixisal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2965/8790/files/sibizawasokatup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/backup_chat_wa_iphone_to_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3809/files/vidyasaarathi_scholarship_2020_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/resident_evil_4_full_apk_obb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/poliwubirevamusijapadode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/abstract_images_for_android_phone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/17112854683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/vinexaguniwom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6433/6040/files/12th_time_table_2019_commerce_maharashtra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/25425886672.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 3760 bytes
SHA-256: 2f93e14170fbc2226d4a57d9b2239c73f31f2a396e97137d174b1cdb4e2d0365
font_01_sfnt_off00007168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7168 5336 bytes
SHA-256: 161acf72cb5bae86a32bf6f0d2819a1415d89e4b71f5593da27cb8f64b0f897e
font_02_sfnt_off000083b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B6 10116 bytes
SHA-256: 5fd9410d4a347de3a50943f4dca3d7920fba81cf27d6b371a742a10dcf953520
font_03_sfnt_off0000a61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA61E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f