Malicious PDF — malware analysis report

Static analysis result for SHA-256 56428c490d46de2f…

MALICIOUS

PDF

48.0 KB Created: 2020-10-22 16:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6f5642de1e4d406d44e3ac6d46205a92 SHA-1: 973ee1dbda9cfa2031a933de564d6a7d2b8d2dfa SHA-256: 56428c490d46de2fe7c4d675e60b4f8e6390b7efa10ea78f9c0dd95276bfca62
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/123?keyword=slendertone+abs+toning+belt+instructions, is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL.

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://gettraff.ru/123?keyword=slendertone+abs+toning+belt+instructions In PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/9186477.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/6fc94af5b7a.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/tojibit-kifigebelanowe-nowepetim-ronusilejukogaw.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://s3.amazonaws.com/wonoti/asme_bpvc_section_ix_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/98929372223.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/teranilojavedaxawifotimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/wefejenijevegifuwujuwamos.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/calories_in_food_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/35781925557.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/rumugefukulaluka.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/guia_calistenia_yerai_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f3ff7bd-b5b7-4c12-943c-7d3f3f16aa77/fawiposidigepon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8044f6c3-febb-4051-b101-959b5b38e3ac/76298165425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13adc864-b84c-4474-afdd-f1b6ad70837f/gonezaromizuzofaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54671f58-247b-48e9-9db0-8b78feccf416/13039379020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6debd861-3367-46be-939f-20dfdc998879/40462412345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3969/4241/files/equivalent_fractions_worksheet_grade_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/dejisalenamagigixewoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/download_webtoon_apk_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1285/6229/files/55054992372.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
font_00_sfnt_off00006d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1B 5232 bytes
SHA-256: bfc23a5cb2706c32e4989cccd8decdd848f6016446ee85f649ea3ee3970931d1
font_01_sfnt_off00007ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE5 11128 bytes
SHA-256: aa6febb9622ccf4b4b0ffb2007d23d9393a86d5d942f00106c760cbaaaeadefb
font_02_sfnt_off0000a4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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