Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a3092f75f7d4f2…

MALICIOUS

PDF

47.1 KB Created: 2020-08-21 19:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 035ee6db16fa68fa8a39e1488df1320f SHA-1: 0daae62cb5bd613c0f818f923ded4444c1ac50d2 SHA-256: 57a3092f75f7d4f25a532f96e802429fd3e19178b7c118dac8ad4b70a6265110
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is disguised as a link to a physiotherapy exercise PDF. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect users 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.cc/pify?keyword=physiotherapy+for+lower+back+pain+exercise+pdf
    • http://metovijox.fenianfear.com/uploads/1/3/2/7/132740708/tinogotasebodofusij.pdf
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/gogosezuzed.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/achillea_millefolium_medicinal_uses.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/californication_chords.pdf
    • https://cdn.shopify.com/s/files/1/0440/0830/8886/files/ret_pally_talents.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/cbc_educao_fsica_anos_finais.pdf
    • https://cdn.shopify.com/s/files/1/0433/0147/0366/files/zukisig.pdf
    • https://cdn.shopify.com/s/files/1/0435/1305/3338/files/manual_weed_wacker.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/21346902704.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/28850891897.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/nojidixewurap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/bilimubogopufonawezolage.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/48376343127.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/94878979555.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_off00007941.bin
93dd507cda322f71d973ed53a0b77bec654d3ea94b4292237f58c9222c4eeb7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7941 5712 bytes
font_01_sfnt_off00008cb5.bin
a617cd3c77d607fbd6f816687d7af46fea187d9cd3f2d274a752e8bdea492c1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB5 10120 bytes

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