Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b39833e65fc58d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-21 00:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be2dad01c664a8d91fe21b99248eb370 SHA-1: 6bf7784d97bbf62c757fd60a094d4cf32e48afad SHA-256: 30b39833e65fc58d8d1228521585fc4b6d50fba4ae181d62c87087526561b088
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains references to the malicious URL and a seemingly benign PDF file, suggesting a lure to disguise the malicious intent. 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.com/pify?keyword=angular+6+form+validation+checkbox
    • http://files.connallyband.com/uploads/1/3/1/8/131856381/koguwoxixude.pdf
    • http://files.theflorecercasitasmx.com/uploads/1/3/1/4/131405976/8235676.pdf
    • http://files.cathleenandgwen.com/uploads/1/3/2/6/132682171/2930176.pdf
    • https://cdn.shopify.com/s/files/1/0428/3269/1363/files/guided_imagery_meditation_scripts.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/i_love_u_my_angel_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/zaidu_vokrug_rta.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/83469949447.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/puzofeluwubufinugowibopuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/zusiwakugomipusoduginufin.pdf
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/xogabusidejonut.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/riviwitofudedarekuga.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9854/files/tesefafamisojajofemurox.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_off0000558f.bin
3264d8036d19059c509e67a7192d58efd7d8cea9e230bcfd612c352a354c6eb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558F 5732 bytes
font_01_sfnt_off000068f3.bin
dc6158272a5095f7e6e8c4ead7ad9c0dd96f80f573e49d92e8d3189fb360c999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F3 14812 bytes

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