Malicious PDF — malware analysis report

Static analysis result for SHA-256 16567496e4a06675…

MALICIOUS

PDF

46.2 KB Created: 2020-08-29 19:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c005c01920464bfec50563381588b9c SHA-1: b3a578b1d87fc158d416a9863a061cba97875ded SHA-256: 16567496e4a06675b8374b8886ca06a6f685750b072078e47395d2abf65732bd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of a password-protected archive lure suggests an attempt to bypass gateway scanning, indicating a downloader or droppper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/wix?keyword=examen+diagnostico+espa%25C3%25B1ol+2+secundaria
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3ab5ed_a489fa5821d64e82b54717197272d124.pdf
    • https://static.usrfiles.com/ugd/a298ce_7af45449a07a4ca2aa2c9a4333871673.pdf
    • https://static.usrfiles.com/ugd/b8c837_f68ba551c4664203a2ecacec1817c8da.pdf
    • https://static.usrfiles.com/ugd/b8c837_98fc5aa7399b4310be49e70d6ba902a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22cdb9f5e104815a60ba5cfedbbd167.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/aaoifi_shariah_standards.pdf
    • https://cdn.shopify.com/s/files/1/0437/0969/4107/files/lopodefuwugowatat.pdf
    • https://cdn.shopify.com/s/files/1/0459/9798/1855/files/c_e_t_exam_information.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/18569348807.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/bobilunekiraxuzos.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/xexenaletanipulim.pdf
    • https://static.usrfiles.com/ugd/353d00_d5523c0096524b008d61fcbf894cb7c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_1356335db90c4d868e3401d46a1d61ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_603c1f8d26f5401094174002416790d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_48ec684d3f1248b9b2c7d97761c96360.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f54dcd7a6aa41818db7af5c9f301ed3.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f2d.bin
cc89e8c6b22eaa13adbee4c480951425b25b5970103425f61555c7bb788e069f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2D 5764 bytes
font_01_sfnt_off0000827d.bin
0c4b65d83b32cb874cf93f51206ca5007c629059d86989db5d57e6dd21aa72c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827D 12224 bytes

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