Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac216b546dd02f7…

MALICIOUS

PDF

43.2 KB Created: 2020-10-31 20:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a180cc04d05d179f08fde0a7ab266aff SHA-1: 275a6242556459275eb57fb0265c9b5731d15330 SHA-256: 5ac216b546dd02f7d8015452bab3ccb47f4d61022461e6cf58f5ecda7bd1e2a2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, and another noted a link farm structure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/123?keyword=never+never+land+lyrics', suggesting a lure to a malicious site. The presence of numerous PDF links indicates a potential attempt to distribute further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=never+never+land+lyrics In PDF document text
    • https://xasugalepo.weebly.com/uploads/1/3/4/3/134311154/7ae10509fe16.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/fovun.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/jimoxuna-podofodakilu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/65856293823.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/julius_caesar_act_1_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d92a3b9-8e36-46f2-9a41-0f3c990bb8c5/rowujimupato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83533915-5a71-46ec-8175-efeda90431cb/keurig_k_cup_holder_replacement_bed_bath_and_beyond.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/twitch_password_reset_not_sending.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/jujezetepaliwasuri.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/41771573511.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/i-_stat_handheld_blood_analyzer.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/dd_blue_dragon_stats.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/applebee_s_menu_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72da547d-9f88-405e-9220-9943bcb46bae/pojosetodisi.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/41750565384.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_off00006af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF4 5064 bytes
SHA-256: 0a6742b5f03ab07c090d8380724b44efe9ab83dd5040fb69f5ff8e6aaab0e167
font_01_sfnt_off00007c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4C 10568 bytes
SHA-256: 9f0d6cd8b47505a8ab2e11c42881bac2aa9188160ae93680938e4e5b539abf2a

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