Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1a5973e264d11a…

MALICIOUS

PDF

55.6 KB Created: 2020-10-31 13:06:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e44d1e3016261cda52983432d5343091 SHA-1: d22cdb43a177d0c228794a35246a609de4a237d5 SHA-256: ff1a5973e264d11a951efffd357a604d1567dd6ed801cea13b3ad8ff1d03fcc6
94 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 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://cctraff.ru/aws?keyword=bam+bas+bat+bamus+batis+bant In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5f8f5365b587c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5f9c52d7321ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381347/normal_5f8fb029a46af.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/d9388e55e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f9d14f60ded5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_5f95e0044023c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f8a6ade2c348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_5f97892ab1f43.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://cdn.shopify.com/s/files/1/0477/0119/6966/files/happy_new_year_2020_punjabi_song_status.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/6263/7742/files/dcfs_illinois_mandated_reporter_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8408/4898/files/84235575660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0397/5098/files/57487604088.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/vigudekibajugela.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009195.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9195 28480 bytes
SHA-256: ac02cfc24f62eddcd1525562d81b13d1a7662a5352f7c732a9627b07f9bc3d5c
font_00_sfnt_off00005d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D47 4544 bytes
SHA-256: 5b7c3a071f99e7dab6c7899ab42b57fda942396b51c0b087fc7a25e0cd6d8d03
font_01_sfnt_off00006c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C90 10860 bytes
SHA-256: 492bfc10af9820a734398fbdd617496a2459f2079c6954406fa2bdfe3b7e6348
font_03_sfnt_off0000c33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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