Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dda52ea004a1e98…

MALICIOUS

PDF

46.4 KB Created: 2020-07-28 04:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f47c3208c303cdeb01386d1aefb1295 SHA-1: f919fb757797cb6f48f0708c978fccd91d2b6b9e SHA-256: 4dda52ea004a1e983645e628c15b37cb327c5f5a1d8464597eba72840d509fd2
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary URL, 'https://ttraff.cc/pify?keyword=alexandre+dumas+livros+pdf', is a known malicious redirector. The document body, though heavily obfuscated, appears to contain metadata related to 'Alexandre Dumas' and 'wkhtmltopdf', suggesting a lure for users searching for e-books. The ML classifier also strongly flagged this PDF as malicious.

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=alexandre+dumas+livros+pdf
    • http://files.theamateurmediablog.com/uploads/1/3/2/6/132681728/wuvonewaxozikinir.pdf
    • http://files.ctcphiladelphia.com/uploads/1/3/0/9/130969206/8376287.pdf
    • http://files.katyhawkinsyoga.com/uploads/1/3/0/8/130813639/5117786.pdf
    • http://files.mentoravenuepreschool.com/uploads/1/3/1/0/131071067/pobesipibuz.pdf
    • http://files.mentoravenue
    • https://cdn.shopify.com/s/files/1/0432/2420/3424/files/4789754963.pdf
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/18364110245.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/ladup.pdf
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/perevutoxomut.pdf
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/buvijixumafa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/maragamebukorezapawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/55330043821.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/nirinedum.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/nigoxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/relexas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/ruvebubusunevegiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2648/9249/files/xuforolebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87277754858.pdf
    • https://cdn.shopify.com/s/files/1/0428/7083/3319/files/riwipexegeverikukozito.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_off00007876.bin
749c63783245e58ac4ea7e27c95eaacf59472625ef6bf607349816a6a6c189a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7876 5108 bytes
font_01_sfnt_off000089b7.bin
2ade5199a25aeb5b2b0696be110b7615cb81625c95d9cec2ebadae7df45a5163		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B7 10044 bytes

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