Malicious PDF — malware analysis report

Static analysis result for SHA-256 819498d3c0d2ab65…

MALICIOUS

PDF

63.9 KB Created: 2020-09-03 13:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d42aaf35b17873db6fe45906765a51de SHA-1: 2af19cf2d3d3cc06367e6ed41f5b7a10935d6377 SHA-256: 819498d3c0d2ab651e0a1b58e9a8ceeec2e96e65cfdb050dc48812383c4e2cb2
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, pointing to external resources. One of these links, 'https://ttraff.ru/wix?keyword=baaghi+2+movie++wikipedia', is flagged as a known malicious redirector. This suggests the primary purpose of the PDF is to lure users to malicious infrastructure, likely for phishing or to download further malware.

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.ru/wix?keyword=baaghi+2+movie++wikipedia
    • https://static.usrfiles.com/ugd/409ca8_efae999cd50040a1bf6ef63806e25e9a.pdf
    • https://static.usrfiles.com/ugd/f2ef67_f3f1288aa128494cb324381127b6f118.pdf
    • https://static.usrfiles.com/ugd/1d5a3f_90e56eac24994e5099f6fe2f18649f87.pdf
    • https://static.usrfiles.com/ugd/8d57bd_d9439a568e2c4f259c091c993cf0c141.pdf
    • https://static.usrfiles.com/ugd/7e84b7_d37d1ed2d0934f8f8d3b37344f6a701f.pdf
    • https://static.usrfiles.com/ugd/ce4b7c_a1ba173c5662497fbb0bca70bf376d25.pdf
    • https://static.usrfiles.com/ugd/66c878_99b5ead06a5146ca9b9cbd99c4c8a70c.pdf
    • https://static.usrfiles.com/ugd/a467d2_ec56f00d7f2140a1b3a305e13f7aeb5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_891e1e417a1c4325ab2beba557355967.pdf
    • https://static.usrfiles.com/ugd/0aab01_6ca612287d4b4bc7965b8d709220aca5.pdf
    • https://static.usrfiles.com/ugd/06497e_87b29e3760c841ffaf78961f49ac46a6.pdf
    • https://static.usrfiles.com/ugd/120874_a8f1365da3fa4c1897d7af900f1e9b46.pdf
    • https://static.usrfiles.com/ugd/610d21_933d1593c26147799a4932bc4114f550.pdf
    • https://static.usrfiles.com/ugd/824332_a016cc51e1fe4d0c973d8141d7337315.pdf
    • https://cdn.shopify.com/s/files/1/0429/0494/4807/files/kelasewiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/skf_taper_roller_bearing_catalogue_free_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f29.bin
2911cc37fc389d608dd0d71a2953e504a7815f5e83378d99f8e48b6308517c10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F29 5464 bytes
font_01_sfnt_off0000a1ba.bin
f1c56f3c50fc14f2aac2dc24262b844678da50e2ddb8a722ba9fe6ae6d1def51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BA 10652 bytes
font_02_sfnt_off0000c67d.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC67D 16164 bytes
font_03_sfnt_off0000dbd0.bin
87755c2648dec6cd82d9a824fb177e6470d5cf7427dc0ef0e64c0cb3fc6fce59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD0 6232 bytes

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