Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1c9e681f53c0cb…

MALICIOUS

PDF

53.5 KB Created: 2020-07-21 03:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d9ae73ce4d47b52fe718fb6f3bf8a07 SHA-1: e7b4e91e2eb1d49ca5627d915609deedb1bf068e SHA-256: 3a1c9e681f53c0cb388db059b91af1efc9b77f8cbf0cdab9d354f1eb559c8cf7
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, likely for SEO manipulation or to host further malicious content. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure. The primary attack pattern involves redirecting the user to malicious infrastructure via a deceptive link.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wb?keyword=fertilisation%20in%20humans%20pdf
    • http://files.schillingtravels.com/uploads/1/3/1/4/131437880/turix-jamiw-tetoxa.pdf
    • http://files.babybulldogs.org/uploads/1/3/1/3/131379828/3060486.pdf
    • http://files.arcanagardens.com/uploads/1/3/1/4/131407734/e2f3a87.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/81126318311.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9730/files/88420107656.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6573/files/pojagerolunekodipa.pdf
    • https://vefevomite.files.wordpress.com/2020/06/naxujimakaralilixatob.pdf
    • https://lekiduvurera.files.wordpress.com/2020/06/dinisetox.pdf
    • https://virebon.files.wordpress.com/2020/07/dulif.pdf
    • https://tufasopud692774767.files.wordpress.com/2020/06/zusezorefukezetu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/tewilekivomolejapewus.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/78683784503.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lasuzopaxikabade.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/zomilokurutodirofedex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/60013770427.pdf
    • https://cdn.shopify.com/s/files/1/0432/1047/3633/files/jakomovuwirofisun.pdf
    • https://cdn.shopify.com/s/files/1/0438/5760/8864/files/zagunededinepevizut.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/surab.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/sivonef.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_off000094a9.bin
25ff170f9de7bc4c895c5ac5e831ec33da54c7a2605d480f424448ae73c20ac7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94A9 5120 bytes
font_01_sfnt_off0000a5e3.bin
cecf9ec10d07dcb36bd78862a5fd64466f289a8231400c33bae4d4b1e3989365		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E3 10376 bytes

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