Malicious PDF — malware analysis report

Static analysis result for SHA-256 6810c8c1baeb260f…

MALICIOUS

PDF

44.3 KB Created: 2020-11-03 00:38:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 98ab9c35d9fa33325431255e12e9120f SHA-1: 4c4e1dba74fd64a38da000385eb05bbbbfd236aa SHA-256: 6810c8c1baeb260f613660df2948f625c40714e5bd238392814173fb273ac806
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains references to 'cosmic perspective pdf' and the malicious URL, suggesting a phishing or scam lure. The presence of numerous other PDF links, many pointing to benign external sites, indicates a link farm strategy to improve search engine ranking for malicious content.

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.com/123?keyword=cosmic+perspective+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/5cc27093-d2c9-4f30-82a1-3b42e2290e30/31718028448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9250/2437/files/bilifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2888/7714/files/best_offline_action_games_for_android_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c5249e-f396-4faa-b3be-45b8c176a7e4/grit_the_power_of_passion_and_persev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3f3775-b146-409e-965f-17377dd583b6/the_cloud_of_unknowing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8099/9611/files/1_2_torn_page_of_fear_and_flesh_wow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c05a9c-7cf5-4b00-b122-e55b881ccf3f/kpss_paragraf_soru_bankas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3900/6113/files/spartan_workout_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3721/9735/files/margaritaville_margarita_machine_cleaning_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1365/0607/files/rawudebaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f457c4a7-0f56-490c-8865-07aa0508d0e3/48048217006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4813/8390/files/zuwufob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e313529-204a-430d-8e4e-6914ac04f321/36290205371.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7003 5024 bytes
SHA-256: 3313b2fd83c78fb6e7c0e5f94583d66730b702f15ccda35494108714707d831b
font_01_sfnt_off0000810d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810D 10528 bytes
SHA-256: cadaef6d7deddf6895ebee2d50b46eed122416a4b8941cdbfe2bcf89970f10b4

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