Malicious PDF — malware analysis report

Static analysis result for SHA-256 37dc39974b16d472…

MALICIOUS

PDF

42.3 KB Created: 2020-08-08 14:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4caf2eb0aab869bb18b5f0a7364ddebc SHA-1: e0cbcb59bed58b0810f041892a85d5bcf591c690 SHA-256: 37dc39974b16d4721dda06d62c7c3ee50794c24bed6a55ace61746ae0113398f
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text '1992 force 120 outboard repair manual' and the malicious URL, suggesting a lure to trick users into clicking the link. No scripts were extracted from this sample, but the presence of a malicious redirector indicates a likely attempt to deliver a secondary payload.

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/wb?keyword=1992%20force%20120%20outboard%20repair%20manual
    • http://files.cprep.org/uploads/1/3/0/7/130738836/vukudusuri-lalali-wowiwukivasox.pdf
    • http://files.tresjalapenos.com/uploads/1/3/2/8/132814220/2859742.pdf
    • http://files.cloverdalescience.com/uploads/1/3/0/7/130740011/3678260.pdf
    • http://files.permadynamics.net/uploads/1/3/1/4/131407737/aaf069ae.pdf
    • http://mumiko.justicecollaborativeatcornell.com/uploads/1/3/2/7/132740836/romososo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8019/files/teams_by_affiliation.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/kegetepinomezuzoresejis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/45887277468.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/ffxiv_parser_overlay.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8860/9429/files/18923918913.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/guwagoru.pdf
    • https://cdn.shopify.com/s/files/1/0436/9599/7096/files/bubble_sort_in_data_structure.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/49170245751.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/5167440914.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/mubilejeriwid.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_off000065f7.bin
203765bf825ef89e74f241c90fd8ff361ab5ddc3be41d02011a03edf2156fc3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 5652 bytes
font_01_sfnt_off00007911.bin
8d3b5ca0020e09fe03156041c9a5bed7c8d248b9c922bd52c4f403548538b3b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7911 10352 bytes

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