Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c0182d27a09dcb3…

MALICIOUS

PDF

41.4 KB Created: 2020-08-28 01:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a73d5835dceecd0bbe33dc1a0f75251a SHA-1: 37c7e8d9d369d7a166e22ec50c1740990f98a59f SHA-256: 3c0182d27a09dcb34b9ea9d8c806d72b6fa5818da092cf70c700e28619cf4d31
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/pify?keyword=hush+little+baby+lullaby+download'. This URL is presented within the document body, disguised as a lullaby download, indicating a social engineering lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.link/pify?keyword=hush+little+baby+lullaby+download
    • http://zebulazi.at1space.com/uploads/1/3/2/6/132681066/laxegogimi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/90978474026.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/46999222587.pdf
    • https://cdn.shopify.com/s/files/1/0431/8226/0384/files/78441463058.pdf
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/free_microsoft_outlook_forms_templates.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/zalebosenujipuse.pdf
    • https://cdn.shopify.com/s/files/1/0428/8934/7228/files/69926004567.pdf
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/architectural_design_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6195/2155/files/vaviku.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8199/files/definite_article_crossword_answer.pdf
    • https://cdn.shopify.com/s/files/1/0460/1590/5951/files/escape_room_app_answer_level_38.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/mibilodi.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_off00005fc8.bin
c87bc26e9af42d3676a252e76aac926f162a7a843822462f96700cd7e759ea9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 5112 bytes
font_01_sfnt_off00007133.bin
8ef86827770213dcb91d33dc448d0425c54128632931ad3c108d401c382f81a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7133 11864 bytes

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