Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7ac7d40cdcee89…

MALICIOUS

PDF

46.8 KB Created: 2020-10-14 18:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fd769aae49df19f907abdde387af4b15 SHA-1: 2002521f91532207a0ef3c434a42c8e34af3cdae SHA-256: 2d7ac7d40cdcee8927b3340a74bae453c21e281b556484578636283fc84c25ac
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.com/pify?keyword=daily+schedule+template+pdf+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f86fc414a275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8708e0d4d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f86fefa90cbb.pdfIn PDF document text
    • https://site-1040398.mozfiles.com/files/1040398/gipik.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/12955257126.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8817/4497/files/mobile_scaffolding_safety_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9624/3364/files/kumon_reward_points.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6024/3879/files/kimixireb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3145/2574/files/letexefoxaviruxevikelon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3017/4101/files/ninja_ultima_blender_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0521dcb1-35ea-4633-94ed-41aef3386f52/26169033665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d9fcfc2-084d-40d0-978a-e49452eaf909/41814580875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1551e030-bb57-4a0f-ab86-9487e9e4b35f/46933129070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed232bc-453e-47dc-bba8-a7596256c430/tebenumolezezizenifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b599c4-d62c-45ae-8ecd-ebde86b74239/83665867044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c517ccb5-82b9-4385-a0c4-ad5653f3cc4e/10997570235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4686/5576/files/xilamabemamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5664/3739/files/jake_the_american_dragon_disney_plus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 5468 bytes
SHA-256: d4c9150edcf36a94e8f3bde39c6c859f59d485436926e03002236c8aa9c54ed6
font_01_sfnt_off00007d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D43 10264 bytes
SHA-256: 03fd399f5412e59b26dac12cacccac54160cef3e0588446d06a470c7e040cd90
font_02_sfnt_off00009fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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