Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c95363e6da576c0…

MALICIOUS

PDF

39.4 KB Created: 2020-09-16 16:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00202e4a2bc3c0412d096ba6b6a001e4 SHA-1: 6a663c3bc3d935b176cc2df8bbfce3d7c7754efa SHA-256: 4c95363e6da576c0cb91a390e419e35544e4789a4ddab4b41d05b52b89990ef8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, forming a link farm, with one URL identified as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious websites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=9+pin+dvi+to+aux+adapter
    • http://files.marisatorigginoyoga.com/uploads/1/3/2/6/132695571/fovimezakefes.pdf
    • http://bavewuvi.rivercrestpto.com/uploads/1/3/1/4/131437919/bf8dac44dcb8a3c.pdf
    • http://files.southdublindanceacademy.com/uploads/1/3/1/4/131483275/tulaberosipigi-wejabuga-waxitugekuz-koxobepax.pdf
    • http://ganifozuw.redwallstudios.net/uploads/1/3/1/6/131606069/boxat.pdf
    • http://files.mymodamuse.com/uploads/1/3/2/6/132681757/gozilokopo-goworobeb.pdf
    • https://55f5b02b-f6d7-4e95-9484-a29df4a8e957.filesusr.com/ugd/36d413_09928aed3c47427b83b7dbd5153e653e.pdf?index=true
    • https://85891517-cc51-48b9-9e3c-cd89a215bb15.filesusr.com/ugd/dec231_f7b783b6e63c409a9710a35eacd5fa6b.pdf?index=true
    • https://6df1aa3b-38e8-4952-8a29-fc623f332a02.filesusr.com/ugd/9bd82e_c304dec58aae4218883fb1de0b1ba769.pdf?index=true
    • https://6f2f9bc9-a73c-4689-a869-ba75c9dc546a.filesusr.com/ugd/bba345_b7396205c2d649ecbeddb3d13ccdfa99.pdf?index=true
    • https://539bbe6d-b797-489b-be6b-04ca56914b5b.filesusr.com/ugd/405339_2e71a7eda21541da8a5371dcb17fc460.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/5024/6048/files/the_road_to_unfreedom.pdf
    • https://b513b5a0-02f9-466b-b0d7-dc9d84107f6a.filesusr.com/ugd/eaf48f_b56e78eab1824683b5a01bf331971282.pdf?index=true
    • https://5ed4b681-a1f5-499f-8821-56e727c6501b.filesusr.com/ugd/eb4c03_15d0b651dd8049a4b4f9fc1334625f47.pdf?index=true
    • https://15783b36-dfb9-4985-98aa-aacf8cafcc27.filesusr.com/ugd/f08e01_4846cf75986a4b6cb8384929c66e3659.pdf?index=true
    • https://5ac4922f-28cd-44dc-92ef-2ecd0677e0c5.filesusr.com/ugd/9bd82e_3e8ea6ba81c54a72a486d4c4e3a5694e.pdf?index=true
    • https://0d1bbb24-aa16-42b3-80df-bff4f5d60448.filesusr.com/ugd/33ab24_0291f1b4a2c94d598b4bb5c13e66ac17.pdf?index=true
    • 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/
    • https://15783b36-dfb9-4985-98aa-aacf8cafcc27.filesusr.com/ugd/f08e0

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ac9.bin
a449f0b648fbedf868ed3a8f874ca4319c9fbb663a60b83e304daf0f8e4c52d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC9 4932 bytes
font_01_sfnt_off00006ba7.bin
ae620cce01ffcf00154eceb9b8c143fbc396901002ec6d25f17022c3efe8c611
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA7 10984 bytes