Malicious PDF — malware analysis report

Static analysis result for SHA-256 300d83e3e0bb9b38…

MALICIOUS

PDF

41.8 KB Created: 2020-09-19 04:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e15dac3c195e4fe39cb7a6ebdbe442bf SHA-1: 1ebcb68b7500634c2c260a980ff3dbaa245ece5c SHA-256: 300d83e3e0bb9b38be1bf343980a5af3b477a4f56fb9ac83b6adbccd1756c2d5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=liquid+asphalt+sprayer', which is also flagged as malicious. This suggests the document's primary purpose is to redirect the user to malicious infrastructure, potentially for further exploitation or phishing. No scripts were extracted from this sample.

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=liquid+asphalt+sprayer
    • http://files.dreamythology.com/uploads/1/3/2/8/132814050/xuwesalizix.pdf
    • https://c15b8a00-4465-4a1e-9193-12abba236a66.filesusr.com/ugd/2b25b5_2a19546b4db1421c85db6e058c8a9095.pdf?index=true
    • https://ddb3661b-caa8-4ec9-9664-22caac23baa0.filesusr.com/ugd/02beb7_32a05a56045d46d7a93e7977dad41117.pdf?index=true
    • https://c7e5c15a-8af7-439d-ac8c-0c4aaebb9851.filesusr.com/ugd/067ecb_2323bc6ff04b42fcb8a8cda2e3b98fff.pdf?index=true
    • https://8068d14e-df12-4fb7-b09c-9d7138df5790.filesusr.com/ugd/d17951_6063439919f5461ca0c67e57a60708b9.pdf?index=true
    • https://294be232-ec7f-40f9-9bc2-a7ba5f8155f8.filesusr.com/ugd/e98895_762ebcab0c924153b779cfa49ebb03b9.pdf?index=true
    • https://29e50ed8-1831-438b-b2aa-2f43dff6fd37.filesusr.com/ugd/a9248e_071d159e079f406c8046e399ef63284d.pdf?index=true
    • https://ae963e35-0567-42ae-8b66-03af78b25997.filesusr.com/ugd/ceb2e8_622b60604e784ebeac05fcddf824deec.pdf?index=true
    • https://cbc99817-3abc-4cab-80f6-05714644675c.filesusr.com/ugd/808cd0_0ac9ec9a380c4033843c46c274f1b3cd.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/6927/6313/files/apc_back_ups_750_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0435/4224/9621/files/37458608385.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/august_2020_calendar_printable_free.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_off000065b2.bin
046dc66d6244c51e04dd766abf58281e39c081fda6c9c9ba58c731327c98e7b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x65B2 5216 bytes
font_01_sfnt_off00007771.bin
d769f7e0a336245960266c25ecc7eccc90d0e7fa8949fbbfe80473ebb0c600cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7771 10424 bytes