Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53eaebcb57219b0…

MALICIOUS

PDF

45.5 KB Created: 2020-08-30 12:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a0b617c82b3db859fa8ce4647386037 SHA-1: b8c7863631f5ecf75af667f60f29b36878ae45d0 SHA-256: a53eaebcb57219b037dec1d3603b301077de932caae0692eb1786dd55602fd48
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link. The primary malicious URL identified is https://ttraff.ru/wix?keyword=evaluation+5eme+croissance+demographique+et+ses+effets. The document body, though heavily obfuscated, also contains this URL and other links pointing to shopify.com, suggesting a link farm or redirection strategy.

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.ru/wix?keyword=evaluation+5eme+croissance+demographique+et+ses+effets
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/delegation_of_authority_and_responsibility.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/32784974570.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/accounting_dissertation_topics.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/string_functions_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3553/files/tasifawugofodewojanazegov.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/gutapupipenuxisib.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/74099427541.pdf
    • https://static.usrfiles.com/ugd/b8c837_423da957b24945749e3364e832b5d02a.pdf
    • https://static.usrfiles.com/ugd/0f1814_97aac2d74f0f42708622799593e5dd3e.pdf
    • https://cdn.shopify.com/s/files/1/0437/2889/6161/files/ocean_eyes_sheet_music_piano_easy.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/wekawawegalemujiponixe.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_off00005999.bin
e3709c9e78ec77ddbaf90129e468545aac1e783a0423206409eac80e5e78f081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5999 5836 bytes
font_01_sfnt_off00006d52.bin
bc0a17b10b8e7bee695ff4cd6bff888d7e3e4f166423c8f33fff3453e9c384a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D52 11500 bytes
font_02_sfnt_off0000924c.bin
f1368e0d82604bf55bb40b01ac61c381dd14042cff43d793d5e70c6199447dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x924C 16088 bytes

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