Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb50b9c179df7edc…

MALICIOUS

PDF

57.8 KB Created: 2020-08-31 09:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e1e176101fc9916ffd108749a620e64 SHA-1: 1e3f0ae0ea5ce1807a9aab1695251fbd3879e8c0 SHA-256: fb50b9c179df7edc7cf5d8c659c4d08e7672d26c11ab5695c304442e5db057e7
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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.com/wix?keyword=margin+of+safety+seth+klarman+book
    • https://static.usrfiles.com/ugd/ade4e6_00db7f46ee804bea9d4d3e7617e484c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeebd7db88c8442e936308865a7e3e88.pdf
    • https://static.usrfiles.com/ugd/b8c837_babffb207e8143ed8cd33ab84d595b2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_50bac93e13434f238ddd3c695c04caea.pdf
    • https://static.usrfiles.com/ugd/b8c837_ccfb64e812744ad59232504a28e0ace2.pdf
    • https://cdn.shopify.com/s/files/1/0459/2553/1815/files/listing_multiples_worksheet_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/27782694080.pdf
    • https://cdn.shopify.com/s/files/1/0438/3883/2800/files/node_read_json_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/brche_addieren_bung.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/pamutawijogozatesoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/devakilafifelojepaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/vafuwuminowezefiguv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/logabeniguvukitotuwas.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/28919867552.pdf
    • https://cdn.shopify.com/s/files/1/0434/4892/6364/files/65802410456.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/persuasive_writing_graphic_organizer.pdf
    • https://cdn.shopify.com/s/files/1/0433/4931/1646/files/bitegutiwesegaz.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_off0000a2e1.bin
ecf632a647678c4d4b13d506cf563c9b4410f2b773817b311bd5b9263c8ff598		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E1 5492 bytes
font_01_sfnt_off0000b574.bin
ca01e5310cd3056dc6e398c187f8e37dd3137511c4a4ba53911e5591751e7d7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB574 10820 bytes

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