Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b913ccf7bf36ee3…

MALICIOUS

PDF

53.4 KB Created: 2020-11-03 22:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c4f46a88b3c8d5a8e4e380322b1c9e18 SHA-1: dc52ac23f32099ac3bd05d86c3c4d70914c84635 SHA-256: 6b913ccf7bf36ee3c6766835495191ebb5343aad00001d40e6e94b4644d09194
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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.com/123?keyword=dragon+city+hack+free+download+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_5f96e9a4730b1.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/vunagagutumizazimis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413843/normal_5f99cf38b4da5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403422/normal_5f96feb830084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f8afcf644b45.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/7081995.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/2cb5f67f-f67b-466b-ad05-fa46d4dddac7/xazavutetogebuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5d9cfb-c48a-4f7e-855b-e3bd20fa083e/totikidifitadiperosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/681d01a9-9818-4134-b1d5-cffbecdc0a8e/doduwobuviguwigitolugapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5396bd-83a4-476d-8f04-5b0aaa91d937/30089069044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cddd1f-f83f-42c9-aed0-d06f50a0a742/casa_amor_exclusive_for_ladies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d8f325-5dd3-4738-a257-e998985e9099/benedini_tbs_mini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24482c04-9fd0-4bce-af3d-04a9f4efd5c0/guffey_colorado_camping.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000744a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744A 5496 bytes
SHA-256: eece89449085abd350deb53f979d2bc08ce59b90fae12f68d5cc4315d7908d04
font_01_sfnt_off0000871a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871A 14828 bytes
SHA-256: e2829eb3d693b8430f0ffea3f8161aa2c8742f6f3d5b4691b0e0a3c0976142f8
font_02_sfnt_off0000b306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB306 16208 bytes
SHA-256: 9a1aebfc3dfcfe114bfdb3d07c81bffae31823deb5f95e724c205e15992d9ecc

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