Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4888d88573d50e…

MALICIOUS

PDF

72.4 KB Created: 2020-08-31 13:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5988fac723db0528fe8f32993212015b SHA-1: 1cdff0264887f685fc7ca91c702832e2ce2adc53 SHA-256: 7e4888d88573d50e8f6e21aa13c3e8c06b7a3ca33a39930c93fbe76c9611804d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same movie title as the URL, suggesting a lure to entice users to click the link. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=perico+ripiao+pelicula+completa+en+espa%25C3%25B1ol+latino+repelis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/1cfe37_56b46fe06bbf4763aa7bca0aca71bb4e.pdf
    • https://static.usrfiles.com/ugd/6f58fb_715d442770a5495f8a99336e822b3a0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb3e57e73b34600926a1f02be3caadf.pdf
    • https://static.usrfiles.com/ugd/1decf9_878650e3cc9348b0b5412a82b539844c.pdf
    • https://static.usrfiles.com/ugd/affaa6_3b8b799af2c7400b8d317fd8823c7606.pdf
    • https://static.usrfiles.com/ugd/3aca14_294f270860a94735a17d8120bacfe7fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_976822f605494c2280f25cbafcfbd61d.pdf
    • https://static.usrfiles.com/ugd/e42ee3_c5a96920aca045e5ba4b4b94c993e120.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/rukulozovonolugowovobik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/ravaxivadurix.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/36880595174.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c743.bin
c1ce6e94c1247863be19672ae78cc83a56b295776474f3df128afbc8a3ed7347
pdf-font-stream PDF embedded font (sfnt) at offset 0xC743 3564 bytes
font_01_sfnt_off0000d402.bin
037412357c461231c5fca54dfdb445470a7db67a714e0c1c2572ed24a38db68a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD402 5292 bytes
font_02_sfnt_off0000e5a8.bin
c927eba5b2c1947f744696b8e4810a2e3a34d43740da17723e6dc843fc2b1358
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A8 14368 bytes