Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a3af24d7238033…

MALICIOUS

PDF

43.8 KB Created: 2020-09-05 12:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 534a5435eeabccb1c47217b903e160a0 SHA-1: c8aa18348270fd64c59b143f50ab09dd678d3484 SHA-256: 68a3af24d7238033b1cae703c9a85d3b3431a10fccc049b5693c4a7b632c60d3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with one prominent URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose is to direct users to malicious infrastructure, potentially for further exploitation or phishing.

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.me/wix?keyword=east+west+play+5
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c81504_e9c0eb71c86d417ca8b8b7656f429ccc.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_a2245cb8888d4adba2addeed1f825b21.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5910a8b2efe4dafa99e18bd97a813a8.pdf
    • https://static.usrfiles.com/ugd/ae059d_41a2054954ac4927a2bed189a59410ad.pdf
    • https://static.usrfiles.com/ugd/696b8a_e50dbf79b6224d478c0578bef47008bd.pdf
    • https://static.usrfiles.com/ugd/99afdc_e4d39826179041c39c5427ae6717497b.pdf
    • https://static.usrfiles.com/ugd/f4de5e_816346a6a570458da624fe7fee732e3f.pdf
    • https://static.usrfiles.com/ugd/575fb0_d3b627c737504167ba4b55bd732b5ca6.pdf
    • https://static.usrfiles.com/ugd/e1d12c_8be1fd62521a4ec18d6bde4022406d30.pdf
    • https://static.usrfiles.com/ugd/7dfe85_f87083c3ee8c48ef8f43dc961dc127f8.pdf
    • https://static.usrfiles.com/ugd/99965f_1175368e030848dca91eb4ad37c38ad7.pdf
    • https://static.usrfiles.com/ugd/58a813_30f850dfb4b842659b7d206bd8ad87e1.pdf
    • https://static.usrfiles.com/ugd/585b1d_28071d0d736246e8bfcc90c1c7b59825.pdf
    • https://static.usrfiles.com/ugd/8ba634_dabe0fef08f14a4489502e394fa71932.pdf
    • https://static.usrfiles.com/ugd/64e449_ffba7a72a1a24ea083a8490e8015eea6.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_off00006f81.bin
7be9f5a566261940146b6f0a4846704c9f84ba8ed11708ce264340a00bd88495
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F81 4992 bytes
font_01_sfnt_off000080af.bin
fa06e8f183703a30cbd330a1831882bd965015675d38687ff8822fffd3b41cfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x80AF 9868 bytes