Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1846582ac684da…

MALICIOUS

PDF

37.8 KB Created: 2020-08-03 01:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a9a586af88f9f06697f282dd89b907b SHA-1: 614ddda090dc9fac128f9bbb5a4d82569697beca SHA-256: dd1846582ac684dae1d00cc26b10d7c379a5846874d808622154c6e1d680aa54
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=save+np+array'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The presence of a 'download button' lure further supports the malicious intent. The document body, though heavily obfuscated, contains the redirector URL and several other PDF links, suggesting a delivery mechanism for further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=save+np+array
    • http://files.araratbaptist.com/uploads/1/3/0/9/130969053/pedixevuxados_finixilisavuve_zedurefe.pdf
    • http://files.theblackwomansocial.com/uploads/1/3/1/0/131071043/dbc22f993f78d15.pdf
    • http://files.xnews.blog/uploads/1/3/0/8/130874067/abb1a4813.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/28744106086.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/57627885077.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/tatedivogoxaropi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/laxebagixepasizowogub.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/92754155618.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0429/0458/4355/files/vesapojidus.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/7475501620.pdf
    • https://cdn.shopify.com/s/files/1/0429/6690/9081/files/crabby_joe_s_daytona_beach_webcam.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/majafiwelubozuluzuzun.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_off00005848.bin
1cacc84e4418cd28b9b344efd9399bb1a72ae3484c1b18edf601bf1d7804a4f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5848 4868 bytes
font_01_sfnt_off000068f3.bin
a0fc9c987d43f1761adf5b23ea3607aeb115b08720d9d5f8149fdb769eb4d4da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F3 9952 bytes

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