Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d440f69045f31da…

MALICIOUS

PDF

41.6 KB Created: 2020-10-28 11:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: 231fe05d0d1774b604ab7a244dd400dc SHA-1: ef51302ede6b43ae98609a9cba88b5a6a7472739 SHA-256: 3d440f69045f31daed00f452ff2db74c38eecfa045735011356959db28477e8a
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.cc/pify?keyword=security%252B+book+pdf In PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/2284291.pdfIn PDF document text
    • https://fizozedodid.weebly.com/uploads/1/3/4/4/134484686/dawovo.pdfIn PDF document text
    • https://zevejekigo.weebly.com/uploads/1/3/4/3/134374512/44ea31.pdfIn PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/2421546.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://zagukosi.weebly.com/uploads/1/3/4/3/134314994/tamogijepuzi.pdfIn PDF document text
    • https://kikuriniwabutip.weebly.com/uploads/1/3/4/4/134440093/venutotafojufupa.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/luvumifed-buzud.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://s3.amazonaws.com/xanebavifamopez/nevizokonawuti.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/class_dojo_monsters.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/68138868402.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/1325602315.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/dialektik_der_aufklrung.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f25bb9-c27c-41ad-8657-2e5d73bf4be7/bufajesaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240eb39a-14ff-4e44-b2d7-909d2714b5f4/kof_2002_magic_plus_2_apk_para_andro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15248c60-fb57-4fd6-bd3a-f1948400effc/letopopitelidobom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f911b5a4-68be-43de-9f30-96e23988aaa8/suluzeledepisasoxapisip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb41ad4-b0bf-42f6-a702-08165c8f3896/sixilig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74aab55b-0f09-442c-ac89-7d12cfbb7ad7/piwesobesuwinojejofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac3af3b-6b34-46ce-ab04-89b286719b6d/bunokejujupekokeluvuvine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2726/6217/files/android_textview_onclick_effect.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8445/7146/files/82504478777.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_off000054ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AE 4916 bytes
SHA-256: e94fab27ad2c30d4624f5f12c792bb70e56bcb2ad392319944070d913bc0565a
font_01_sfnt_off0000657f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 11004 bytes
SHA-256: 5db86c602ebc6a4a4a32b465d9d87a9ca846e431cfc1e3f6423639006d3ded0f
font_02_sfnt_off00008b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B32 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e