Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5aef53a312653c8…

MALICIOUS

PDF

44.1 KB Created: 2020-08-22 06:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d30da003b7070e782636e5b5dc9153a SHA-1: 638fa1f0cb1ebc6137741f5bd01a8d958825192a SHA-256: e5aef53a312653c8b3b52e9f6d01e8544f1ca5d713ffaebb35141d68a3ebdce9
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.cc/pify?keyword=avg+mac+os+x+free', is designed to trick users into downloading potentially unwanted software or malware by impersonating a free antivirus offer. The document body, though heavily obfuscated, contains references to this lure and the redirector URL.

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=avg+mac+os+x+free
    • http://files.evincarter.org/uploads/1/3/1/4/131437477/wanasiritizedel.pdf
    • http://files.maketheeffort.org/uploads/1/3/2/6/132695321/mijod_wegiretujajug.pdf
    • http://dekeleg.stephens-lee65.com/uploads/1/3/1/4/131453540/03fcd65e5b18cbf.pdf
    • http://gexoxeteb.dgvaluations.com.au/uploads/1/3/1/0/131070420/415313eb77dab7d.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/30934025213.pdf
    • https://cdn.shopify.com/s/files/1/0433/6697/3589/files/44645402848.pdf
    • https://cdn.shopify.com/s/files/1/0448/7512/0807/files/ludokonasesefofufibameseg.pdf
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/14089804719.pdf
    • https://cdn.shopify.com/s/files/1/0440/6309/6984/files/solid_angle_arnold.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/652363555.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/wimetamu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/docker_remove_container.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/31860202213.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/duxejavunu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7678/7107/files/fadenixogigaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/tintin_comic.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/discord_text_formatting_color.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_off00006d8a.bin
385f206154182d92b70eff15bc28ecafc786374a6fdfcb5c09c5c0cf9e1b4b11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8A 5284 bytes
font_01_sfnt_off00007f7a.bin
a75e7234d259995a8ce7f13319f0e2bde5649868aabfe7085fec08e3447715f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7A 10476 bytes

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