Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbef3f60ca9a2db…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 17:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c613195ba5de50c714a4a6585f703dcb SHA-1: 70cdb7b84a8a547a4a4ea7fcce0bbfab0e99ffdb SHA-256: cdbef3f60ca9a2dbdabc6646aedfe1136acee1b3e0e97a8b8330fc7283d41bfe
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, many pointing to Shopify, suggesting an attempt to create a link farm. The document body contains the text "Reglamento sobre promociones y ofertas" and a URL that aligns with the malicious redirector.

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.club/wix?keyword=reglamento+sobre+promociones+y+ofertas
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/52551115355.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/wilovogubufusipaxek.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4512/files/lixenowesojaxujuwejuvok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
    • https://static.usrfiles.com/ugd/b8c837_385dd0bc74064aeca4d26ae599aae002.pdf
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/bemewivib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/tomewudo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4658/4999/files/how_to_convert_cdr_file_to_format_online.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bcc5f2c98884778aaea515996663cd5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c9c9cb729df4c818de01045768e1714.pdf
    • https://static.usrfiles.com/ugd/724fb5_abe59b45e0b0447b876068cb0a96a08d.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_da8250e725e04246a4bf027beed50401.pdf
    • https://static.usrfiles.com/ugd/b444d4_d7866b282bdd44ceb3e30433c7abceca.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_off000055c9.bin
80cc4916632faa9a184c1aaa3670e69ecb1a8bb3c4e07cd02234662124ddec8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x55C9 5584 bytes
font_01_sfnt_off000068be.bin
aa2828bff432242160682eff45c4685becb2b31abdb6e0781ba12bac525f680f
pdf-font-stream PDF embedded font (sfnt) at offset 0x68BE 10968 bytes