Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db4a18f739b2614…

MALICIOUS

PDF

50.3 KB Created: 2020-11-04 13:22:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bca815ff88d5a7e41c6cf5300f3ada53 SHA-1: 2fef6ff5fb2841c87d0d6f5ed81b22e8a0dd8b4b SHA-256: 9db4a18f739b2614983ff2a113171bc1e9ee5b5e0d6e1b366e7bb0c639b8d6cb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body and embedded links suggest a tactic of creating a link farm to lure users to potentially malicious content, disguised as search results for book titles. The ML classifier strongly indicated maliciousness, supporting the presence of these deceptive links.

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.link/123?keyword=a+stolen+life+a+memoir+jaycee+dugard+pdf In PDF document text
    • https://warasogufav.weebly.com/uploads/1/3/4/4/134440103/4632001.pdfIn PDF document text
    • https://vemewibikem.weebly.com/uploads/1/3/0/7/130776349/jefafilox.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/5878198.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/fufaragebo/ziguzatitezabaforogum.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gifesegeg.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/consulate_general_of_india_atlanta_holidays.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890f4781-b9de-42d5-b9b8-e88377be08f3/29966662969.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/lg_washer_wm2650hwa_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuwaterexaf/burlap_table_runners_hobby_lobby.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/landscape_urbanism_reader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca573fd2-dc0a-4ce1-8d81-d2782e709b7b/the_science_of_good_cooking.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/armywriter_counseling_statements.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/divina_commedia_purgatorio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb8c889-bfce-4a7d-b251-653235bf183e/nbc_today_sponsors.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_off00008462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8462 5644 bytes
SHA-256: 79ac4c626947e9392adcb56d966b30e9dae635364cfab00a6d3395b4b62999f7
font_01_sfnt_off00009791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9791 10960 bytes
SHA-256: efa8bbeb37a1d67fd329e5b81b77bbbe677993eaa89cc33479eff63d2dc28a66

Open this report in the interactive analyzer, or submit your own file for analysis.