Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a866e6b2e648d4…

MALICIOUS

PDF

53.8 KB Created: 2020-08-01 03:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9da0c38991d32c6535bc4743bc836f76 SHA-1: 596f9dfa108cd1e7d4af6e21c008541ce9e0f160 SHA-256: 20a866e6b2e648d4ac9579333031ca2b8b55cb21e3b5f584fafda18c0e3ecaa8
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=new+yorker+poetry+submissions', which is identified as a malicious redirector. The presence of numerous embedded links, many pointing to Shopify domains, suggests an attempt to manipulate search engine results or distribute further malicious content.

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.com/pify?keyword=new+yorker+poetry+submissions
    • http://files.airychimes.com/uploads/1/3/1/0/131070718/3621547.pdf
    • http://files.thebuttonbadger.com/uploads/1/3/2/6/132682802/acab69956a9b.pdf
    • http://files.jwhitneyart.com/uploads/1/3/1/3/131384127/32306b867c554bf.pdf
    • https://cdn.shopify.com/s/files/1/0439/0679/3627/files/54375395958.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/vidamedukibugalexekon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56325204281.pdf
    • https://cdn.shopify.com/s/files/1/0433/4383/9385/files/fitimewugasasijipebarasom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/fejajogitazesodopumaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/kebumopilerozinis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0061/9423/files/38141119442.pdf
    • https://cdn.shopify.com/s/files/1/0433/5822/4549/files/56790633945.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/79020815235.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/jigewuke.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/duledogoxazesasulilazama.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/64413136738.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/42151794716.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/doximazoralusam.pdf
    • http://www.newyorker.com/
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007039.bin
ffc9a1742f9fd98221b0737a2f9c17fed49f1774502256e7b802bc8c91a3ee20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7039 4972 bytes
font_01_sfnt_off00008123.bin
ee41c24c9bd449240fa80513f0e867168e0eb6a6ec1ad79b99c2196d6aa93ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8123 10644 bytes
font_02_sfnt_off0000a5d1.bin
ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D1 16344 bytes
font_03_sfnt_off0000bb49.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB49 4324 bytes

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