Malicious PDF — malware analysis report

Static analysis result for SHA-256 d825f6c874b68e31…

MALICIOUS

PDF

41.0 KB Created: 2020-08-13 02:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 447d849b40f2404efa2cd81597c2a0b7 SHA-1: d2c69b2c570914cf9624d311033ee856a4d8c516 SHA-256: d825f6c874b68e316e9834bc4b44d93b6c14ba682a88b8f2c5f62ef7ea9060e5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting an attempt at SEO poisoning to drive traffic to malicious sites. The primary malicious URL identified is a redirector, indicating a likely phishing or malware delivery attempt. The document body, though heavily obfuscated, contains keywords related to technical documents and the wkhtmltopdf tool, reinforcing the lure.

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/wb?keyword=theory%20of%20elastic%20stability%20timoshenko%20pdf
    • http://files.kspaceonline.com/uploads/1/3/1/3/131380868/b7e90.pdf
    • http://files.whatwonderfulwine.com/uploads/1/3/0/7/130740401/5461032.pdf
    • http://files.ryankitley.com/uploads/1/3/1/3/131384169/jozud_dozuj.pdf
    • http://files.carrigartpresbyterianchurch.com/uploads/1/3/0/7/130775866/75564599544c.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8274/files/computer_bill_of_sale.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8637/files/axis_and_allies_1940_global_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/0697/6422/files/5692043077.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/78919075408.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/asma_ocupacional.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/firewall_security_system.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/82405108216.pdf
    • https://cdn.shopify.com/s/files/1/0434/2687/3509/files/39036295532.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/shoo_fly_don_t_bother_me_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/25309833122.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/zofuwodasujetunav.pdf
    • https://cdn.shopify.com/s/files/1/0433/3197/7370/files/pijefulawirigufosusepu.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_off00005064.bin
ee95eaa6254eaa8ca0280f2ea5e7ae449021aced5241405b491048b49751cad2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5064 5436 bytes
font_01_sfnt_off000062b4.bin
edc22a883df7b34a0936fbf9912230aeabdf2c8b970e09b33aec48451d177160
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B4 11180 bytes
font_02_sfnt_off0000870d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x870D 4324 bytes