Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9c1448ae961021…

MALICIOUS

PDF

45.9 KB Created: 2020-10-26 15:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1b6f2ee2723d2dea104eb7ac3fd20909 SHA-1: 811123dcdaf2105cbffa3a801f96d8023aaaa049 SHA-256: fc9c1448ae961021d5ccbd286b8496759767d4702ffc9d08c2819f455d55f37d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as origami instructions, which redirects to a known malicious domain. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary malicious activity is the redirection to a harmful URL.

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.club/123?keyword=origami+flapping+bird+folding+instructions In PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/fodevezewipozofidepa.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/devamet-derekaw.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/1/0497/2360/5153/files/arvore_de_natal_petroleo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5094/3142/files/canon_lbp6230dw_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1711/8111/files/clash_of_lights_10_apk_update_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db8da34-384a-4be7-98f1-f4b8f5141b1a/85028137301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98d4381-de0a-44e9-aa99-e52f3c7f19df/81280935973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4229f602-f8a8-4b7f-80a8-51bf5e94b6b9/42148681396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2581/3663/files/what_is_my_grandfathers_cousin_to_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3210/7937/files/zikivumupide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9439/6068/files/lord_of_the_flies_chapter_3_summary_quizlet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0276/4701/files/83885029338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0851/4974/files/11892397606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4703/0436/files/diesel_engine_basics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4274/8069/files/duzozizexizore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9424/4008/files/rogaboxogosigosigatakepin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2821/8524/files/cycles_of_matter_webquest_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/autodesk_inventor_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/janotoxulonogifatak.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000734f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734F 5640 bytes
SHA-256: ad8fba2e690eb9ddf83fbc10a27c5ea70d153de81013550deedec6e99280c2b6
font_01_sfnt_off00008656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8656 10484 bytes
SHA-256: 09285ac10aeb587d22eaef3768c2e8d3eab24efa4d6f8b21f2ca201bc4b7718c

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