Malicious PDF — malware analysis report

Static analysis result for SHA-256 718df25b4e5f9607…

MALICIOUS

PDF

43.2 KB Created: 2020-09-21 00:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c9a970fc27380e3884d8ebbfa48c30af SHA-1: 0a76a1c66363d178ab909897605d8f25d27d4309 SHA-256: 718df25b4e5f960755c78c9147b39bfc690be8e0a6b268e1ea81e6e1cefc9989
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a link to a known malicious redirector, ttraff.link, which is likely used to distribute malware. The document body also contains a call-to-action phrase and a URL that appears to be a download lure for an Android application. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this file.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=java+apk+for+android+free+download In PDF document text
    • http://goviruxa.passionofchristbook.com/uploads/1/3/1/6/131606165/kigizufe.pdfIn PDF document text
    • http://files.tezamenzelzate.com/uploads/1/3/0/7/130740260/jakesepuxutevo.pdfIn PDF document text
    • http://nesobo.thatmomwithablog.com/uploads/1/3/1/8/131857590/342aadcb53a681f.pdfIn PDF document text
    • http://files.jrselectricinc.com/uploads/1/3/1/4/131453213/xowawaj.pdfIn PDF document text
    • http://files.mupss.org/uploads/1/3/1/3/131398334/6683348.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/1/0435/9431/7981/files/34444538863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1907/4716/files/averages_from_frequency_tables_tes_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/honda_gcv160_engine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8289/8839/files/dangers_on_the_oregon_trail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/iupac_naming_of_inorganic_compounds.pdfIn PDF document text
    • https://14b5ad9f-1313-46f9-a15f-8a4dd801ae92.filesusr.com/ugd/2c608b_7d6a6fbe7bb6472fa275cf148b0bf026.pdf?index=trueIn PDF document text
    • https://2d690ce1-267e-4afe-a18c-e02417fb9315.filesusr.com/ugd/a838c0_81e1c9d7e1884088b3aed4b7598c90e1.pdf?index=trueIn PDF document text
    • https://9f540073-8a79-4cdc-bf1f-e19d1d94eb8e.filesusr.com/ugd/b1277d_8ce8c02d9be246d2a2abf4d5aeff31e6.pdf?index=trueIn PDF document text
    • https://dd3d6a92-4aab-4d65-9e9c-60d45bf93e5e.filesusr.com/ugd/96a426_7acdd9ecda10401a8bf52785afb15b0e.pdf?index=trueIn PDF document text
    • https://71158d1c-8f95-4a11-9d1e-7eb95973f196.filesusr.com/ugd/837d34_1011d7f580bf4d39a2986e5694efda93.pdf?index=trueIn PDF document text
    • https://459c4846-36d6-4991-ae69-ca868b2c9c2e.filesusr.com/ugd/7be1cd_c0289055fcb348bdadccac875ed5e790.pdf?index=trueIn PDF document text
    • https://d6832b94-731d-4123-8a9c-8758e95d33b3.filesusr.com/ugd/fb83f1_c912b32e0bf847cab108cc9f09eea123.pdf?index=trueIn 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_off00006a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A76 5060 bytes
SHA-256: 9ddf9ed9cec46d5bc23d1599f6f8602a4a21a9914c4219b97551546492b79c7f
font_01_sfnt_off00007be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE3 10428 bytes
SHA-256: 0822b800f43ee3ad3b590c6e8b3d762d0a434d8ffdd10271dad92af19a2aa7a2

Open this report in the interactive analyzer, or submit your own file for analysis.