Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2860e2ea2715cd…

MALICIOUS

PDF

43.3 KB Created: 2020-10-28 19:45:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b63547ec3f68328672abee0fe3e93650 SHA-1: 44774ab0def6207bc550e114a099977c67afaca1 SHA-256: af2860e2ea2715cde95176e16bf102d59f826f94b63285fc1da6f3e52d59571c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary link to 'ttraff.com' which is flagged as malicious redirector infrastructure. The document's content, though partially corrupted, suggests a lure related to visa support, aiming to trick users into visiting the malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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.com/123?keyword=letter+of+financial+support+for+tourist+visa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f90300689163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5f8a6b645a47f.pdfIn PDF document text
    • https://misikeni.weebly.com/uploads/1/3/4/3/134336029/3826132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f8e4121d6eff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f9058c818d21.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/wadebulodanoluv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f9967eede189.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/tubixofopijuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384323/normal_5f93fea9406ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f87620b944b8.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/0888efd709fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f886a6b6359d.pdfIn PDF document text
    • https://gemiwanot.weebly.com/uploads/1/3/4/4/134495393/675716.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/tejixapi.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/zeguxubizexeruxin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7827d2d0-30c7-4f40-b78f-70dbaefd860a/kosagamodubazadava.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/pantone_formula_guide_solid_coated_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/kubenerabilatamidoganunen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6123/1262/files/what_young_india_wants_google_drive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7785/1553/files/bloons_td_battles_apk.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_off00006b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B09 5012 bytes
SHA-256: 1ea1791d725c4131c2b10082aa2ade23999714993cc1b3b6f1e6019840faf1d3
font_01_sfnt_off00007c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C34 10320 bytes
SHA-256: aa806e849491845d3caab404c5cea08ffb037de408b1dd2622f8965ce1497294

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