Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7c3f20139c32dc…

MALICIOUS

PDF

42.1 KB Created: 2020-10-30 11:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 384ea9edfc5094f334522a509ae9f9a7 SHA-1: 48506ac1c8736f2179f697f7ae38d70ecfbb0484 SHA-256: ab7c3f20139c32dc99d8f124d8e345c035d2c108221887fa9ba1c1be740cb931
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/123?keyword=minecraft+world+edit+undo+command', suggesting a lure for users searching for Minecraft-related content. The presence of multiple PDF links and a critical heuristic firing for malicious redirector links strongly indicates a phishing or scam attempt.

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.club/123?keyword=minecraft+world+edit+undo+command In PDF document text
    • https://diveziriluro.weebly.com/uploads/1/3/4/4/134447321/zuvopurojazej-rumami-detimokef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f939ecd03fe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_5f93a0a18917c.pdfIn PDF document text
    • https://funiwulew.weebly.com/uploads/1/3/2/8/132814073/juzij_jufimug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/niporofez/which_of_the_following_are_included_in_crm_reporting_technologies_check_all_that_apply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b1d408-3304-48f2-92ea-9194ed4916a8/63062831757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/312f894c-a229-455f-ad09-302878bbde02/75030149974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23753613-0c58-4efd-a629-ca53fa9ba4f5/8599288089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/573fec53-002d-4c40-ac23-7d4b450272ae/97905484465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24fa166-bd84-4f89-a93a-55d0f03a38f9/watch_the_amazing_spider_man_2_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb225d62-6857-4cd0-8732-cc0dbcb3f901/89562366114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/6102/4185/files/foritokewusakujigatomigik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6c6407-8036-42b7-81df-cf03020b6269/9276431487.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_off0000624d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 5088 bytes
SHA-256: e029b64a1abbc280481c8a19cbe49d7ea2702fa5084a012c7e928baf0511db8c
font_01_sfnt_off000073a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A4 12280 bytes
SHA-256: 387492c51c6dd353829f31f78a6e3acc2d08dc893af9dd00c2cdafc3d157da92

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