Malicious PDF — malware analysis report

Static analysis result for SHA-256 df667de3e145fa0f…

MALICIOUS

PDF

40.8 KB Created: 2020-11-04 03:02:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 1a3f7e382ac414a066c4ecc43c718ae0 SHA-1: 4ae5cafc6d28a7d49b2a35d00afe90827dfc163e SHA-256: df667de3e145fa0f089c4b209b750ab8713916882e37247d419dd450d7308746
184 Risk Score

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.me/123?keyword=bike+race+free+top+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f88005823dc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f91cbaced8e2.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/sofivutijomivar.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/bukokamuguxat_jiweruzu.pdfIn PDF document text
    • https://zekasujiminog.weebly.com/uploads/1/3/4/3/134366003/pilatadaraxuxekuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8957b211cf0.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/pexivo.pdfIn PDF document text
    • https://disinuxokisukoz.weebly.com/uploads/1/3/4/6/134610262/9474777.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/1/0497/3022/4279/files/kebim.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/31737069111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0245/4428/files/hawaii_state_id_card_cost.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_off000060f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F3 4912 bytes
SHA-256: 757559c507380a0b4775c58c2a4db59e557cb6a7bd37a9cb9a654b7c5585b9dc
font_01_sfnt_off000071c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C6 10892 bytes
SHA-256: 765f1734eb11a81f2e9406ee029cd8ab8260bffa817efa5fefa4feeb16b07c91