Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a47313819eae786…

MALICIOUS

PDF

42.8 KB Created: 2020-09-02 01:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46ab7b83df64b0725d7ae5fef47854cf SHA-1: e553ef663e00204bf8c9ddec30b1856847804bc3 SHA-256: 3a47313819eae786f09c734b7eeb2bbde1750a1d4a8cadc642920f67652d48bb
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'bearing number and size chart'. This, combined with the PDF_SEO_LINK_FARM heuristic, suggests a phishing or scam attempt. The primary IOC is the malicious redirector URL.

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.me/pify?keyword=bearing+number+and+size+chart+pdf
    • https://static.usrfiles.com/ugd/b65acf_43713384499b4bf59e8b4f750f58568b.pdf
    • https://static.usrfiles.com/ugd/b8c837_08e756bc544b49d0911562dc1fd8912a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fad1ec8506d492aa393b8ba15f0c18a.pdf
    • https://static.usrfiles.com/ugd/e2b09b_47976fa6a38548d1aa1226d26fc4471d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2190803f6a4aa79018dbb087649e63.pdf
    • https://static.usrfiles.com/ugd/2e16aa_a574228986d347d9a66ce0a935ee76e3.pdf
    • https://static.usrfiles.com/ugd/8ba634_1709d996b6384af4b8249191ea81b72e.pdf
    • https://static.usrfiles.com/ugd/69695d_15a08989844c4d81b9725c724acf2b55.pdf
    • https://static.usrfiles.com/ugd/b8c837_e96821df49074073aed284cbbc37b7f2.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/65009420921.pdf
    • https://cdn.shopify.com/s/files/1/0434/2372/7783/files/77074488647.pdf
    • https://cdn.shopify.com/s/files/1/0463/7815/6187/files/android_tv_apk_store.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/fovuvasajejijuwamaral.pdf
    • https://cdn.shopify.com/s/files/1/0432/7099/6128/files/92778712904.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_off00005b61.bin
af079de1b976b18fe0aa69ded56cc89ec11ef98b3e2ba6fa42336eb64277b458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B61 5548 bytes
font_01_sfnt_off00006e12.bin
3099b88d1717c7f859715af0e3f365cf02857de77e8593f61f18113e3877882c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E12 10280 bytes
font_02_sfnt_off0000907f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907F 4324 bytes

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