Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8b04bc7d3cfc97…

MALICIOUS

PDF

44.2 KB Created: 2020-09-01 01:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0594b3d59424f9203619b18f4b84fb7b SHA-1: c565143b743119d338ed0f5404514df9201e0141 SHA-256: ac8b04bc7d3cfc972e4dd343fdc19a2246eddddd69254138ba41c66a852828be
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to 'Consumer reports best dishwashers 2017' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links further indicates a link farm strategy, common in SEO poisoning attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=consumer+reports+best+dishwashers+2017
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/redoreremed.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6071/files/business_process_reengineering_tools.pdf
    • https://cdn.shopify.com/s/files/1/0437/8741/9805/files/68742047899.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/javascript_remove_punctuation.pdf
    • https://cdn.shopify.com/s/files/1/0440/1345/3470/files/86240475140.pdf
    • https://static.usrfiles.com/ugd/89064d_cc3c3d75ced9431e88389819b70c7d55.pdf
    • https://static.usrfiles.com/ugd/c7a620_d0de9ad9095c405aa2103b6e5d4e1221.pdf
    • https://static.usrfiles.com/ugd/e5a943_8a8b5abca8914f8cbed2876a5a1b808e.pdf
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/41650515642.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/totegozuzojeb.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_off00006e2f.bin
0d833d803581c956e17ccb9d2b2ba8049ee9792ead45aee87eb66cd37f933a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2F 5712 bytes
font_01_sfnt_off00008181.bin
317098bdbbe4c74f3ef227db14a2d73226397968dae1ad88b56f68ac32b416a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8181 10224 bytes

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