Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae4a04138456a20…

MALICIOUS

PDF

46.1 KB Created: 2020-08-03 19:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bafde2f8db7d6b1fe0ae5ef53bd217e SHA-1: 62f5e26425217d74ffb7615a35573eb1bb04c9d5 SHA-256: aae4a04138456a20a80797bc3ea10cba21ef993dc0be3cc26b0ed8fd1ead6f25
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 external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=everything+i+never+told+you+novel+pdf'. The document body, though partially corrupted, contains references to the novel and the PDF creation tool, likely serving as a lure. The ML classifier 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.cc/pify?keyword=everything+i+never+told+you+novel+pdf
    • http://files.kara-hume.com/uploads/1/3/1/3/131382841/d32249a01b.pdf
    • http://files.hcesaladmaster.com/uploads/1/3/0/7/130775172/3eb7fa43d508ad9.pdf
    • http://files.aberdeennaturalburials.co.uk/uploads/1/3/0/7/130740207/tenuzeledanawoboj.pdf
    • http://files.naturalcommunitiesofgeorgia.com/uploads/1/3/1/4/131406173/fesenuxutalazane.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/bibopejaravuvenowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdf
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/98921991231.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/suzuzela.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/41410808115.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/69970362390.pdf
    • https://cdn.shopify.com/s/files/1/0434/7428/8793/files/how_to_make_a_branch_in_github.pdf
    • https://cdn.shopify.com/s/files/1/0437/2047/4779/files/23150720393.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/strikethrough_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3791/files/nuxuvixadedotod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/webugolotudorimoxu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c3.bin
7cad9c751af61ba82ef6ff87d45791bf7297b7d5824ebda64fe630aa0257892c
pdf-font-stream PDF embedded font (sfnt) at offset 0x68C3 4916 bytes
font_01_sfnt_off00007982.bin
d875159cad5b4ae390b5838e4db4af156fb7cf7cee9545335b3bfcb99ead9c0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7982 10304 bytes
font_02_sfnt_off00009cb6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB6 4324 bytes