Malicious PDF — malware analysis report

Static analysis result for SHA-256 349e006697c06257…

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 10:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d8c611f108a7ed0237c4dae04f93b7e SHA-1: bcbbee44d914aa4dc02d8de5c9ba7af9a92ac321 SHA-256: 349e006697c062571ae006ca7a7c81150d108a2c0cc08021021141746be72098
152 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a technique often used for phishing or malware distribution. The primary malicious link, 'https://ttraff.cc/wix?keyword=como+sacar+el+area+de+un+octagono', points to a known malicious redirector. The document body, though partially corrupted, contains text related to calculating the area of an octagon, likely serving as a lure to disguise the malicious intent. The ML classifier 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/wix?keyword=como+sacar+el+area+de+un+octagono
    • https://static.usrfiles.com/ugd/b8c837_de645057731a4d4885797e5ec200911f.pdf
    • https://static.usrfiles.com/ugd/e02969_f7337ef88c444ee9be27b1358a1c7e0a.pdf
    • https://static.usrfiles.com/ugd/99965f_32c7d74f9f9e44fb98777423931d22a2.pdf
    • https://static.usrfiles.com/ugd/857e61_45b414e3ca27427e8ea87a2e65d29fdc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0a240b999dd4962a9aaa97d70bbd310.pdf
    • https://static.usrfiles.com/ugd/b8c837_e79c0f4815e3483199cd39ad8e361528.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b50c75b0c4f4e008c3dbcb52dc4e5cc.pdf
    • https://static.usrfiles.com/ugd/eb6612_a7d35ecf651040ddbe18dbf0d3abbcf4.pdf
    • https://static.usrfiles.com/ugd/79cb75_1c5b12eea1af471c9793c0fd6f537d31.pdf
    • https://static.usrfiles.com/ugd/b8c837_69ea20d14b0140ecba4d52c61cc1b7ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_1db9cf71629548d7b3dc077b23ff0c00.pdf
    • https://static.usrfiles.com/ugd/e745be_fab12b9b2b764a5fa3f33ecbb8208104.pdf
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/solving_equations_8th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/nusipo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/fujovosafeligugi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4442/8181/files/kovotegibilipixuwogixivem.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_off000062f2.bin
8b6568444795e6de69e84eeb9344604ac2cf59bd63b82453faa5a780e44353e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x62F2 5164 bytes
font_01_sfnt_off00007465.bin
dda82d1a78ab1f9ab55b60876e8058e7a5c960a2e893b6b8249597ac5da32616
pdf-font-stream PDF embedded font (sfnt) at offset 0x7465 12140 bytes