Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e18e99a11e14060…

MALICIOUS

PDF

45.3 KB Created: 2020-10-26 11:06:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 714f76b8657dd5954d92f998b3076b02 SHA-1: eb9b27a0c3eb35c7d706e32965fe0d968634c949 SHA-256: 8e18e99a11e140608b05cdfef10257b6e7704dd5d8d9628732d62e96cc2717eb
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, disguised with a keyword related to public holidays. This indicates a phishing or scam attempt, likely using the PDF as a lure to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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.link/123?keyword=queensland+public+holidays+2020+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa8f2dc-9208-49dd-9182-7b5477f816b2/45069884421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b24453f8-c2b9-44c3-9bc2-e6c54a4deb86/1476243924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b5a036-e832-44a7-a361-a14894e353ce/19052235075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4635c429-2beb-48d4-869f-685c00c390d2/snap_tube_for_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7117c4e3-4e68-415a-8181-d957bba03cbe/gelixopefava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6701baf-12c4-4c1a-a601-aeb810e9e29c/zetajisufir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d825c8fe-c527-41fc-b13f-30ab9ec894ce/fokiwivomexulula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab08423f-804a-470f-a4f6-44a1c3b31c22/68648074964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3816/3623/files/navy_mr_answer_key_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9902/1219/files/disability_does_not_mean_inability.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5767/5421/files/esc_guidelines_nstemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8650/1806/files/song_cutter_and_joiner_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/ird_payment_slip.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/17767949728.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/13934052961.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/98597920378.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/foundations_of_aural_rehabilitation_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/40816534939.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/vikunulugafoxolixipex.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/bizowegu.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/utility_software_notes.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_off0000702a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702A 5724 bytes
SHA-256: c7459deeae8dbd2a45885d0f79acfa58414af52012da9f0d5c5896359d44f58e
font_01_sfnt_off000083a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4 10556 bytes
SHA-256: 8e7409183c9bcfaea77c563fd68614806b375c3544be2de0311b89d230a85bc3