Malicious PDF — malware analysis report

Static analysis result for SHA-256 64829a55a95bcc7c…

MALICIOUS

PDF

50.0 KB Created: 2020-10-29 08:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3f2118fc871a0f07ea9390b403af74e4 SHA-1: 45910618a0f35b20ba1fc1c525f5f103335dbc28 SHA-256: 64829a55a95bcc7caed0630bd2c6b5f3cb378d2f2a6d15d8b38fe16ed2e9c529
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 a critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://ttraff.club/pify?keyword=madison+river+fishing+company+clearance', is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains the same lure text and URL, indicating a deliberate attempt to trick users into clicking the link.

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.club/pify?keyword=madison+river+fishing+company+clearance In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f9344e0f06e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f876f1bd4c20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5f9a53e12056c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/what_is_pepega_megaphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0116/5993/files/lutazobetifubeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5004/6893/files/threefold_law_wicca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/tes_figural_cpns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9891/5484/files/composition_and_structure_of_the_earth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8461/4299/files/pejukediput.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/84852144072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0728/5147/files/67349720410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/536f460c-87d4-4135-a00d-6021ec0217af/evermore_piano_sheet_music_dan_steve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/spanish_ar_verbs_preterite_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c84941-c983-4e16-8ef2-8fd9e6ddf988/94855658818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3785/0262/files/pic_collage_with_video_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/zusadozijelev.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/puvedigap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/vmware_esxi_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/dadavemo.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/atomic_structure_word_search_answers.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_off000081a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A4 5736 bytes
SHA-256: a60abb099d83ec33fe86ecdf142d107361a71f71d92a91c8b76672e24c468376
font_01_sfnt_off00009529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9529 10448 bytes
SHA-256: f659531f3d7e4977d7f6f446783b7933a8d604c85e0b9c84695cc04ed07ed8d1

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