Malicious PDF — malware analysis report

Static analysis result for SHA-256 c592bb987abfbfbc…

MALICIOUS

PDF

40.2 KB Created: 2020-08-28 03:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc53d27fdb9cb203333fe64e09fac662 SHA-1: 2896c7951074ee8742472bf94163382a05105655 SHA-256: c592bb987abfbfbce9f98097ed92a838c5cb49923514c6a15a5809b5d17a10b4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=the+universal+traveler+pdf', suggesting a lure to download a PDF. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/pify?keyword=the+universal+traveler+pdf In PDF document text
    • http://tuvib.vividpk.com/uploads/1/3/2/3/132303382/dodeku.pdfIn PDF document text
    • http://files.sitemuse.org/uploads/1/3/1/6/131607010/fanedimawopo_wuxudaranu_nakesawapakamot_kilaviwizikuwal.pdfIn PDF document text
    • http://files.philmancusi.com/uploads/1/3/0/7/130739175/zowugomod-vikapexosoko.pdfIn PDF document text
    • http://files.431775997417950473.com/uploads/1/3/2/6/132682646/ea99fe5713.pdfIn PDF document text
    • http://luvadi.gimmethelodown.com/uploads/1/3/1/4/131438044/dipaxawazonol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/towimulanipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9550/7615/files/65250203075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/33984715416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/sodika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/74462683735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0709/8262/files/descargar_simulador_ser_bachiller_2018.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d6.bin
ed1dee57eb9b2f1de9f8f45e83385ae2135832200e0212625f995e0ecef0c96d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D6 5136 bytes
font_01_sfnt_off00007249.bin
a770a81c169fbb20b76291ba17985503e6b92fb7ba4b9bfd8a742f2ccd48793d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7249 10024 bytes

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