Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3818afeb77a0923…

MALICIOUS

PDF

40.6 KB Created: 2020-10-17 18:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a1abfbf64270b39e6d8633052fd4c95e SHA-1: 411628a808ad50afc83772dc2850a6927c26f9cf SHA-256: f3818afeb77a09230685c6b488d824f33639d5860a86296deac3dc27099be907
194 Risk Score

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.me/123?keyword=hashtag+get+likes+apk In PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/vipufupujexusop_tovazusebep_wavatavixujuv_zoluvutumeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f892c00e8d58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f8866309cd18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f8a53556299d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f897ddeea373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f8a4b4b1b670.pdfIn 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/4160ecaf-de5f-48cf-bb61-a1c977c6938c/rivifadad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18672633-187c-484e-9631-532fd4b5d10b/33843855243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f145b3a-2957-45c5-afac-b987495ca0bc/27730947061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc98319-3409-49d0-a38f-5af34eb15ed0/81474834283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa5a755-0db8-4d3c-9fa9-6bb25c1bd6b8/kexuresikutigesaramubipik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ddda089-714e-4320-be8a-dc612c29537f/83571283963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e14a0f-81a9-4e25-b7c0-291137615f4d/93667828797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e92811-4ecb-4e0d-b580-7ce0c8890ffc/rebokupiguma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e875db-8130-4e68-a36a-b9810a3a44d1/xitodefutifev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files/lewis_and_clark_expedition_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6470/4155/files/airplane_flying_handbook_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2358/0322/files/harvest_of_corruption.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea833c5a-1184-4c96-99ab-70093766942f/48376715331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c193edc7-d222-4f66-903c-8317e089d01b/wonaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/734e677d-a1e4-4c52-9d78-6fe0af36d087/gubegurudanowajivon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee3654e-8b15-4b7d-96f1-6b09ce04042c/10459303518.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_off00005f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F56 5008 bytes
SHA-256: 94ca8453d976d6805b0cd625e23ffa8f8a64c23d3ee8d84d8f1e16d2e0b8c58a
font_01_sfnt_off0000705c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 10880 bytes
SHA-256: 3915ff900862d559bf82a3f3a6634acd6097cbbc9223f82f444d35b3e9c2d7f2

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