Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff2116f2d7f2e8b5…

MALICIOUS

PDF

48.4 KB Created: 2020-11-03 23:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 675f124fd25f0cd94de52ecd019d4b66 SHA-1: d5eb1a344f9e774a80c907e2959f5118dc6f7985 SHA-256: ff2116f2d7f2e8b5d1af12c8aced3938d6c2bdfbc0752d920744c040f6892927
94 Risk Score

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=recipes+using+lap+cheong In PDF document text
    • https://gulemexaw.weebly.com/uploads/1/3/4/3/134360266/3230855.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/0c811.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/b4ce54b0-f06e-41fa-9c3d-e82514ebb1da/vevaluj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9499/6635/files/49909305293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4dd1c9b-1e59-43da-b493-a916d5597155/80918789292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7607d05a-0659-4a8d-8178-2f610578813b/71136480174.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/fakigatotenefe.pdfIn PDF document text
    • https://s3.amazonaws.com/tosasugokod/fitbit_alta_strap_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/96902995885.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/all_elements_atomic_number_and_atomic_mass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fce772c-314d-4952-a596-6c0bb5cf532a/manual_de_manejo_de_new_jersey.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/glass_aquarium_lid_20_gallon_long.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/95178365266.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
stream_003_off00006f1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6F1A 4808 bytes
SHA-256: 279a0395345ef559c27c3c9ba7c7ebc9e46ef9b9eadf07f01655f6eb3526f8f0
font_01_sfnt_off00007fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE0 5104 bytes
SHA-256: 61e68fa78ef96c9fab79c677944f5057fb0668549f0cbcf063fac487b0deb7be
font_02_sfnt_off00009145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9145 10376 bytes
SHA-256: 72ddad2a0b06dcf7b9c39bb1d6a2824f2d87c53b843e4a3e8aed7d5a7a068dc8