Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d46b6ea5078a503…

MALICIOUS

PDF

37.6 KB Created: 2020-09-02 10:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc89343fc8b5d992c6c328c228f9bf8f SHA-1: 7804222e2c5d55218a58515a5d64125bcd8cd4cb SHA-256: 7d46b6ea5078a5038bcf73afb1445d13dba66f2c4de64b91bd510d762d2a9b44
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.club/pify?keyword=big+rich+town+song, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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.club/pify?keyword=big+rich+town+song
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/64823185053.pdf
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/future_where_ya_from_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/bewenogidugefik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/uninstall_go_launcher.pdf
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/36676807448.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/95019548177.pdf
    • https://cdn.shopify.com/s/files/1/0440/8085/7253/files/41938950506.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/nixonopigon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/7295983271.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://static.usrfiles.com/ugd/55cc32_30c2eb17d2e54390ae374e1506e81a2a.pdf
    • https://static.usrfiles.com/ugd/63022f_9ba6a31c7cd741d689cf858a8ae6c092.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e92215b4e45415382f634a0c6f2f504.pdf
    • https://static.usrfiles.com/ugd/b8c837_545d58b1651b46a18cf7f2d7318c0028.pdf
    • https://static.usrfiles.com/ugd/3615fb_601e184babbc4a41b3943de918e77c85.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_off000053fc.bin
74fa3891c34640bb15b58a08129d39b661666158fff3c795b01a372f9a56d898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53FC 4960 bytes
font_01_sfnt_off000064f9.bin
d1a6f24493b4056d8c4b2a7da87817458659556098e9b89b0916e1ba1212e955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F9 10924 bytes

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