Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dd1413f84f7428…

MALICIOUS

PDF

35.1 KB Created: 2020-10-15 15:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 64359df9bf85bd8402a9a2200ced9e2d SHA-1: 3d0d9849f8bdc356b0e3b6924225d400f32c6170 SHA-256: 38dd1413f84f7428a28e1381c27dbb39e4c2f3866461b9959f508f6f537b05ea
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, functioning as a link farm. One of these links, 'https://ttraff.club/pify?keyword=pharmaceutical+dosage+forms+disperse+systems+pdf', is identified as a malicious redirector, indicating a potential phishing or malware distribution attempt. The document's structure and the presence of a malicious redirector suggest it is intended to lure users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=pharmaceutical+dosage+forms+disperse+systems+pdf In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/teximajovevogekapad.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/4b5a1.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/jibigamefomoni.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/xalutos.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f873af8d1048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f87a8668be23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f8758ae64871.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/didigex.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/rigigavixafeded-zepoxexadokixo-vukixemefixej.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/1/0428/9380/3679/files/rust_airfield_puzzle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9936/3764/files/drawboard_surface_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/8298/5887/files/59965004690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5966/9909/files/elenita_cards_palm_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9479aebb-e6dc-49f0-9ac1-2b93e6c15ed0/palagidevufoxowisuvona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b85be24-fe8c-46dd-b497-a67e46938a79/sokatuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28bc4e9-6d37-4d83-8a39-f870404e65d4/56717655570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64380c9-d430-4edb-8dfc-13c8535f84ee/jomilabonunidexosobe.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_off00004a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A58 5672 bytes
SHA-256: 3bf0bf74baf7c6d3a61f730c8c3098e75e92116561279ce7fef687bb02aaeda2
font_01_sfnt_off00005d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D81 9696 bytes
SHA-256: 0ffcebaebbb6f46c49ecafb4ebf05b63ae47b61896b892ff81da93bf348d0955