Malicious PDF — malware analysis report

Static analysis result for SHA-256 40037a78d5b96dd7…

MALICIOUS

PDF

57.6 KB Created: 2020-08-07 22:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4205ef3a81e55d55eddd5f86896d14bf SHA-1: d965623b8e5f03019bcbebc3f355bd17c7c57756 SHA-256: 40037a78d5b96dd7356546cdb881a1f3ab3cdbf3bdb091688811fd8949deabe3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document's primary purpose is to redirect users to malicious infrastructure. The presence of 'SE_LOLBIN_RUN_COMMAND' suggests potential execution of commands, likely facilitated by the malicious link. No scripts were extracted from this sample.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.ru/pify?keyword=anemia+microcitica+hipocromica+pediatria+pdf
    • http://files.kingsfellowship.net/uploads/1/3/1/4/131437982/zolit_rexofifodikof_ramevusaso_gevasufuk.pdf
    • http://files.theamericancurlstandard.com/uploads/1/3/1/4/131453259/aaefbebca.pdf
    • http://files.springhousescioly.org/uploads/1/3/1/3/131380471/1161555.pdf
    • http://vuvafoki.prographics3.com/uploads/1/3/0/7/130740141/zopuzenanalodil.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7162/files/mac_address_vendor_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/40288231767.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/xefoxefo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0431/8507/8423/files/basic_c_language_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/banquet_definition.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4108/files/33299014867.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/28164749512.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17810153535.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0450/files/xudawujatisuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/paul_feyerabend_against_method.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/zavatudiluw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3214/0186/files/microbial_biotransformation.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_off00009c91.bin
728c295398e5090609ba4bc328f0b1456b713e7b1e8d9a7a3712a7e1bcfbaa65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C91 5176 bytes
font_01_sfnt_off0000ae00.bin
757654a739c7e76b3329cf8e110ed0091b145c9f5014a1ddc81ed16cebd1e62d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE00 13412 bytes

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