Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc719cdc612db2d…

MALICIOUS

PDF

41.7 KB Created: 2020-09-16 20:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0023401dbe032583d83d970f4f1b01ce SHA-1: 02baf5f6ec01661e5aad72e020b1a5068fdfa5dd SHA-256: fdc719cdc612db2d2011dae804bc97f4892707f72b0207d5b09c7f3979ee8c01
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate a PDF link farm and a malicious redirector, suggesting the primary purpose is to lure users to malicious websites. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the analysis of direct payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wix?keyword=cuales+son+las+partes+internas+de+una+pc
    • http://mizuj.ravyoshi.com/uploads/1/3/1/4/131408183/pozovum.pdf
    • http://fapif.projectechelon.org/uploads/1/3/1/4/131453501/2962702.pdf
    • http://lajavubun.documentdesignandcreation.com/uploads/1/3/1/8/131857419/717820.pdf
    • http://tizirit.frenchbulldogrescueandadoption.com/uploads/1/3/0/8/130814328/vewakemam.pdf
    • http://fabada.fmjhchoir.com/uploads/1/3/0/7/130775432/5edfb84d31b4c9.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6142/files/cerere_preschimbare_permis_auto_2018.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/adjective_clause_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/sizamodakemak.pdf
    • https://cdn.shopify.com/s/files/1/0429/4731/3827/files/dofonunoma.pdf
    • https://2750088f-92d8-4d4f-9549-821b3dba7040.filesusr.com/ugd/26481d_910f7f28d926457ea266c8d334ca26b5.pdf?index=true
    • https://c5432876-cc0f-4b76-b2e9-0063b23c0177.filesusr.com/ugd/c6ac46_fd87faf54fae425eb0ae282862c34185.pdf?index=true
    • https://ccd10878-b06c-47a0-bfd0-f4ba6fd877c0.filesusr.com/ugd/c83fdb_1d54e59132bf4d9aa24047c823b70e86.pdf?index=true
    • https://6d472709-5346-4e80-a553-abe6d98919dd.filesusr.com/ugd/625844_600437cc6b5148978cefa35f2ac91d6b.pdf?index=true
    • https://c750f84a-fade-403c-9c0b-5c59371c1d41.filesusr.com/ugd/f1780b_863cb389b50844e490013bbc31030b17.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ac.bin
55404a821a051d089e0fd1be990804a13c9718c4443b3dd42f6f7542082f330d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AC 4972 bytes
font_01_sfnt_off0000749b.bin
dac457378df22c535d1e4760a5b5a4abc8c369eddb292f3d51637193bca73732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749B 10956 bytes

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