Malicious PDF — malware analysis report

Static analysis result for SHA-256 02019eb080b3efdb…

MALICIOUS

PDF

45.1 KB Created: 2020-08-30 05:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efc6af9f60fa512b873b11e757702712 SHA-1: ade46c15f3026d9021ed3e713340524887e75393 SHA-256: 02019eb080b3efdbe336677f17a2b3698bc8540bbe95618b04e275912fa730ad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary URL, and PDF_SEO_LINK_FARM indicates a large number of similar links were generated.

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=ark+ragnarok+artifact+of+the+cunning
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/c1615c_39524cab181741da808b7e3483bf3a9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c95c291dcff41a7a5d6699a56dcc9b6.pdf
    • https://static.usrfiles.com/ugd/9219f8_0fb513d705fc4fcf9cbfab4e487eea28.pdf
    • https://static.usrfiles.com/ugd/a18aa6_1647dbb190bf4f638724c9cb0fc39861.pdf
    • https://static.usrfiles.com/ugd/191a6d_6d6260ca31ca44f7804fa057d80447a0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/bidivumovusokemigedene.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/bejosebatuve.pdf
    • https://cdn.shopify.com/s/files/1/0434/7943/3382/files/567743719.pdf
    • https://cdn.shopify.com/s/files/1/0434/1914/0252/files/cambridge_igcse_mathematics_core_and_extended_coursebook_with_cd_rom.pdf
    • https://cdn.shopify.com/s/files/1/0459/8779/1015/files/epson_tm-p2.01_driver_windows_7_64_b.pdf
    • https://static.usrfiles.com/ugd/625844_2f74de22a3fa4029a8f1162a67bd813a.pdf
    • https://static.usrfiles.com/ugd/01e791_b528f68c023e417c9c10d00ceb658c8f.pdf
    • https://static.usrfiles.com/ugd/60933b_f6944729bfe84c01a5898d767e59fefe.pdf
    • https://static.usrfiles.com/ugd/52b593_8a0d99088c0649c292ae13053d89af2d.pdf
    • https://static.usrfiles.com/ugd/79cb75_7e2e16da23144f3daaebeccae9f4f6dc.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_off00006755.bin
1ca9668c2f48f912a1b0bda2f1812425f52f6a1838ad518a84afe26594b52dbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6755 4868 bytes
font_01_sfnt_off000077db.bin
abd9f126decbe878dc396055a04eab71973f8cf4f31b2449bc452fb1c9eb48df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DB 9720 bytes
font_02_sfnt_off0000991c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x991C 4324 bytes

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