Malicious PDF — malware analysis report

Static analysis result for SHA-256 173631d9c2a5160a…

MALICIOUS

PDF

211.7 KB Created: 2020-10-28 08:20:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d72eb179124591a0e791ab41b77c42bf SHA-1: 3dd99589008aca5fbaf58be1c1c3e2822817c4b5 SHA-256: 173631d9c2a5160a9b0e93dbe62c0a65dcc32b3a304f956cd595bdedb4f003e1
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier as malicious and contains a link to a known malicious redirector infrastructure. The embedded URL `https://ggtraff.ru/pify?keyword=one+piece+giants+size` is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware download page. The document's metadata indicates it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ggtraff.ru/pify?keyword=one+piece+giants+size In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5f90ea8253c48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393353/normal_5f95418250c93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f871c7d42393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f8a4151be5fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f8ac5f41b53b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5f8ba89a4b780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5f8b7990e47f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f8d369323587.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/lubil.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/xomokuli.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/ccna_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/46654258848.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/hiv_aids_awareness_prevention_treatment_and_services.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/scientific_names_of_plants_list.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/al_ahram_weekly_newspaper.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/rarobisamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/36020279673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5746/1440/files/wopagofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1842/2936/files/easy_universal_tv_remote_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1802/6917/files/al_quran_tajweed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0877/7118/files/retro_mini_fridge_home_depot.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001b83e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B83E 105868 bytes
SHA-256: b9a66af9f7e999ce1a9f9090ec05e3686cd31e14d4198c031a1a6e2f586aedc1
font_01_sfnt_off0002f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F316 5052 bytes
SHA-256: aecd6518890db69cd0cb8a0cf96561b9e830d1d1853411e699015971d080077b
font_02_sfnt_off00030458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30458 6148 bytes
SHA-256: 0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207
font_03_sfnt_off00031438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31438 14128 bytes
SHA-256: 4630c992cb160b63b694c7974c283625d5d05ca35421d70f7e6bbcf46cbb6c6c

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