Malicious PDF — malware analysis report

Static analysis result for SHA-256 3047fc605e0c257b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 04:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44bc7ecf4b90c296a70be8eb73732886 SHA-1: 86cb9f8cafade29d297f5b93e7b67ad41b0a607c SHA-256: 3047fc605e0c257bd0698403dd15e3ea8770fa23ba3a5b99a8babb6f32a31b68
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. The primary malicious URL, 'https://ttraff.ru/wix?keyword=biggest+loser+logo+pdf', is designed to lure users. While many other URLs point to benign Shopify files, the presence of the malicious redirector and the PDF_SEO_LINK_FARM heuristic suggest a link-farming or redirection scheme to distribute further malicious content.

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=biggest+loser+logo+pdf
    • https://cdn.shopify.com/s/files/1/0465/8855/9525/files/lefebudesajogekukalogim.pdf
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/zamawodogabe.pdf
    • https://cdn.shopify.com/s/files/1/0457/3403/5622/files/family_worksheet_for_1st_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/7044821341.pdf
    • https://static.usrfiles.com/ugd/3cb679_4bed02eff45d4afd9d473b78a157bfc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9842a2897bf4bdc9bb74fe7f8ce7dda.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_22729d002d004ef0b5131598e6ca18e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f6c7368f94247e494fa07c04dd2c076.pdf
    • https://static.usrfiles.com/ugd/7ff653_98e31cf7f5504b6d99f1c78703d46332.pdf
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/kixezusoxavazolamonopin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7786/9476/files/66960883101.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5243/files/dental_school_personal_statement_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/nagakuwi.pdf
    • https://static.usrfiles.com/ugd/b8c837_39a3f44cf804498ea10c6a147c3aed1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_affe1b30498c467f87c4f69187cf9570.pdf
    • https://static.usrfiles.com/ugd/07625c_e3345198f0584e148168c458626d04d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_1426225cefd9417493bf0331e6b88b03.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_off00006517.bin
0480b433eebc208f4177c6fe045c9fbffbde5b255039292729cc73e798204dae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6517 5048 bytes
font_01_sfnt_off00007654.bin
e7d7d664a4fc34fbb18076a39a9455b056d5a89558cba29a1f2a4969a11c79c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7654 10424 bytes

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