Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3b46b22048949e…

MALICIOUS

PDF

33.2 KB Created: 2020-09-04 04:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d05fd94b136c5d543e22ea40d1ee6e22 SHA-1: 6ee06be4a38ee48e66840c8e2049361fc5b582fd SHA-256: 8c3b46b22048949eae243ca2e7eeee7b7163adb4b456250994b05412d69b31a1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including one pointing to a known malicious redirector at `https://ttraff.me/wix?keyword=jingle+bell+animation+song++video`. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or credential harvesting. The ML classifier strongly supports the malicious nature of this PDF.

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=jingle+bell+animation+song++video
    • https://static.usrfiles.com/ugd/97493d_448b97559b194499944408885d75606b.pdf
    • https://static.usrfiles.com/ugd/a43ec6_c4db22536c524b808462c5c6d95315d7.pdf
    • https://static.usrfiles.com/ugd/18122d_fe76fb7dc1a34dc6bc52587fb2dceadd.pdf
    • https://static.usrfiles.com/ugd/10cedf_3a0034e7be334a5b9b92489bc6e00290.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/91106021931.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/antibioticos_para_infecciones_de_piel_y_tejidos_blandos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0526/files/tamil_album_songs_free_new.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/ejercicios_present_perfect_still_yet_already.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/bonovovolafuguzakidobev.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/9944007504.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004439.bin
2a4535c3cdeaae5468604a682d65694bfc1cd3a130a8b61fc63a9dba5a1ae121		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4439 5240 bytes
font_01_sfnt_off000055ff.bin
091990c3bf42f804ffacbd3da3dbfc1f7e3ab71ed312e4be2a96c438e5ea7a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55FF 9956 bytes

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