Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5433daea47842e4…

MALICIOUS

PDF

49.6 KB Created: 2020-07-29 06:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1494f5f72ce723329fefda6d938f7e32 SHA-1: 571b395a700ef82a7b28e5172d6d1ffec3714872 SHA-256: c5433daea47842e4c7a01d31f9167588750cc61eadf1a2ac316992020efb654a
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The document body appears to be malformed or truncated, but the presence of a link to 'ttraff.cc' suggests a redirection attempt. The file's structure and link farm indicate a likely attempt to manipulate search engine results or lead users to malicious content.

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=clasificacion+de+los+virus+animales+pdf
    • http://files.brittneynicolefloristry.com/uploads/1/3/0/8/130813301/fupaxenudujutamomafo.pdf
    • http://files.maybrittohman.com/uploads/1/3/1/1/131163846/kobabizokel-kuwuraz-divewiz-gidezoxed.pdf
    • http://files.besticandib.com/uploads/1/3/1/4/131406036/db881334.pdf
    • http://files.aaastay.com/uploads/1/3/2/6/132682239/838006.pdf
    • http://files.committedtohim.com/uploads/1/3/2/6/132695741/toxanum_definanugipepip_gopegi_jasotufo.pdf
    • http://files.besticandib.com/uplo
    • https://cdn.shopify.com/s/files/1/0438/3673/5645/files/sodam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/titejuzipijomevigef.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/99644050403.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/72335867791.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/26523506452.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/33971593196.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/gujemetadesitenegalapebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/25866455026.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/medarovadujagowurevasote.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/nulobofetufifine.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0971/files/11943831993.pdf
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/xaxezuzudadu.pdf
    • 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_off0000803a.bin
cc73e1b70bef549254a0fae16473447887cd75c2e0b68191cab5150b56343dc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x803A 5188 bytes
font_01_sfnt_off000091c2.bin
5929d07e36853dd37aff2d0f7824e054aa6a205ce81d1cc54e41d50961b89233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C2 11264 bytes

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