Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd91c809aa32613f…

MALICIOUS

PDF

39.4 KB Created: 2020-09-14 04:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6990e2d72fad958cbc6b4e6af5ddd9ef SHA-1: 7cd7f19537ca1e9cc9109ac6c51a2f6e1920658f SHA-256: fd91c809aa32613fdccd86fa815f413a2792d569c559b93388f340d5946f3c20
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one prominent link leading to a known malicious redirector. The document body, though heavily obfuscated, contains text related to refrigerator dimensions and the malicious URL, suggesting a lure to trick users into clicking the link. The heuristic firings confirm the presence of a malicious redirector and a link farm within the PDF. No scripts were extracted from this sample.

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.club/wix?keyword=whirlpool+french+door+refrigerator+dimensions
    • http://fefivisa.mreisley.com/uploads/1/3/1/4/131409474/robovirixonilo.pdf
    • http://files.kairosskate.com/uploads/1/3/1/6/131637149/medutetenajinaluru.pdf
    • http://zozenenox.theduangroup.com/uploads/1/3/0/7/130775792/mojuwilubevanef-suvesugazakuden.pdf
    • http://files.bluelionhomeinspections.com/uploads/1/3/0/7/130776208/7905739.pdf
    • https://static.usrfiles.com/ugd/289c5e_203b9ed700464446bd7ecf65bee37e34.pdf
    • https://static.usrfiles.com/ugd/8ac1ab_3c6e8d328ed1417ca5e5d906e105e1f7.pdf
    • https://static.usrfiles.com/ugd/0182ef_66d92c3786db47799dacfd192e807ea1.pdf
    • https://static.usrfiles.com/ugd/aff7ca_348ee614be21459292682c8772a189ef.pdf
    • https://static.usrfiles.com/ugd/9bd8c3_dac34ff327044825b88db2951d5cb418.pdf
    • https://static.usrfiles.com/ugd/61b8bf_8189d35e448446a5875e4a87953c4f72.pdf
    • https://static.usrfiles.com/ugd/f34323_001b59a30981408e962e8c6ff4407a61.pdf
    • https://static.usrfiles.com/ugd/a07927_0f15a7659b4d481d8076c5c3348a0135.pdf
    • https://static.usrfiles.com/ugd/a4d998_337fd44d851e4687aec73e5d6f0d3dcb.pdf
    • https://static.usrfiles.com/ugd/decf6f_ad822e4181ff47e5a55c92d2b43dc0cf.pdf
    • https://static.usrfiles.com/ugd/4aae87_06816d8607944948be0c15a2680b6b49.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_off000059e3.bin
75ed693826d390c4e9472a4106befd0315d95413845531dc8427d786b1f029ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E3 5580 bytes
font_01_sfnt_off00006cc5.bin
db1ecc92147618c1b84ad1761b8b3832840134617bf00b36f1e98255222c68a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC5 10480 bytes

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