Malicious PDF — malware analysis report

Static analysis result for SHA-256 853820b5286d9de6…

MALICIOUS

PDF

46.5 KB Created: 2020-08-30 23:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 560a2d4a2cd7a63aca14508c8db0f46d SHA-1: dc26f885090ada248c89ceb2f2e614922cacb0ec SHA-256: 853820b5286d9de6caaa5a0d7401b794bee1dfb05afebec699ecc0a40da817e2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, which points to a URL that appears to be part of an SEO link farm. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of multiple Shopify-hosted PDF links further supports the SEO link farm tactic. The file is identified as a PDF, and the heuristics indicate a redirection to malicious infrastructure.

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/wix?keyword=devar+magan+mp3+songs+free+download
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/82187444756.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/deductive_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/571475918.pdf
    • https://cdn.shopify.com/s/files/1/0435/3874/3450/files/88714465613.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/worksheet_for_grade_1_reading.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/90780706183.pdf
    • https://static.usrfiles.com/ugd/e745be_558aa49af3264ab79aae70ea2ff219b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f1ae89cf41b429faa78f7ebe8b3003b.pdf
    • https://static.usrfiles.com/ugd/a1fb72_4b0ec59ba17f4722be7be75a8b2bb154.pdf
    • https://static.usrfiles.com/ugd/b8c837_cec769a20d4b4e14ac8439ac311efde1.pdf
    • https://static.usrfiles.com/ugd/b8c837_55dcb8d9da9740ba95e7494f69c9a316.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ddc04b3d3224c8b907a8014768819ca.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_off0000539f.bin
1bfa773412d5b26d1fe97efa5f1181a93df69daf021b4f9db7a406867261973e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x539F 5676 bytes
font_01_sfnt_off000066ef.bin
db3b8761205638b58820e7e8d4adb23f131438320b297cfda9211f52984d5fbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66EF 11200 bytes
font_02_sfnt_off00008361.bin
f200fde4bb8947cae6e3efcbc69222863efdb23da87ae93d0213a26d054553b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8361 12396 bytes

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