Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ace48659a7f6e11…

MALICIOUS

PDF

53.2 KB Created: 2020-10-25 15:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 19757c46fcefea1ad2401c4e502ad3c0 SHA-1: 1a0dd2a8e94bea140bbf18eb853e9bce9072e6d3 SHA-256: 7ace48659a7f6e112dbe800f084862a93d90ffcfbda105498f4edd63567ac177
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/123?keyword=download+game+free+fire+apk+for+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f888adf9b330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_5f8b9cf390321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_5f89ba6f16ebf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f881faf1cef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f8ba172518d3.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/1/0432/8685/5844/files/secondary_math_2_module_2_answer_key_2.10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0288f8cd-9650-4178-846b-3e49dd607944/ejercicios_packet_tracer_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e788b2-c2ee-444f-ad4b-1ab223fe22ea/potumoxajege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deb16588-8952-4664-8d19-27ae7bff50f6/wuroniwaxozet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/550c21c6-2d15-44b3-8196-8ada94cd2406/61546878128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da3a17c-e937-488b-8686-3e806c78dffa/99038769501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb9b783-188f-4b7b-b836-51b6d8e20d8f/43122211988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95763c20-99fd-4a80-9b15-c0dadcd7267e/27296337101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a96b9ca-4642-4b61-9314-3dde3cc66e3a/98618677958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e04b705-21d7-4d99-87cf-07723c0c63ce/7677521981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4866/4740/files/86396827482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/9276/7644/files/pixegoxofoxabotubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0709/0589/files/medicaid_nc_provider_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/luffy_gear_4_wallpaper_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2425/1042/files/grounding_meditation_script.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_off00008514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8514 5160 bytes
SHA-256: 20f49f909f1c61115bf57a2698dfb818e118e88a137d763e6e100fe314c47817
font_01_sfnt_off0000969d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x969D 10140 bytes
SHA-256: 93cf755cd0813aa87698c50077f26ced7e86125701b82030a4df326afd775d4e
font_02_sfnt_off0000b944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB944 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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