Malicious PDF — malware analysis report

Static analysis result for SHA-256 64225e071e9ff9f3…

MALICIOUS

PDF

43.9 KB Created: 2020-10-18 02:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e592bc4b72cfbf906f77c825d79c5412 SHA-1: a670c93f9db37f610287038e90288b9ca3796522 SHA-256: 64225e071e9ff9f39e130b6d971a0e17e84e52f5f3c1e19890f559f4ba933888
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=game+killer+pro+apk+revdl In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f8779366d506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375887/normal_5f8b787967bf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f8ad5fad73a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f872a8d50914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f87c752ddc1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f88b051e295e.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/3814d2ec-199d-486a-ab9f-48f9c4a5cb9f/pubosapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e0841c7-1e88-47c7-a49d-a598d9270c34/gafatinamulobojatozuwel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1228d103-52ba-4bc7-8323-fd989a13e4d1/31504213601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a497b90-36ba-4b34-80bd-7788f9e08522/sidaxawidusagun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af7f1f07-63e1-40ed-bc1c-17dc3530daf2/pokemon_fire_red_omega_download_in_gba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1baeaac-4702-4fb1-9079-e7e507629ca3/mukajixarena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4947/2159/files/duxupebisupulurulefedeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3894/1599/files/54547311008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/jakon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7305/1042/files/textnow_premium_apk_old_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7270/9542/files/divinity_original_sin_2_official_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7442/7296/files/echs_online_application_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0653/7111/files/epic_battle_fantasy_4_exp_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7988/4186/files/mojipifilisoxevexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0195/3442/files/the_navajo_origin_legend_characters.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_off00006d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D98 5084 bytes
SHA-256: 9710e1c1a805eae8e31056eb6db4461775582a62447b69e518095d443aa75bec
font_01_sfnt_off00007ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED6 10376 bytes
SHA-256: facf1bec1f5cb73576bb0879b47b319af80922dab029538b47963386ccbddd3d