Malicious PDF — malware analysis report

Static analysis result for SHA-256 4650c13268a4997a…

MALICIOUS

PDF

43.8 KB Created: 2020-09-18 05:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9e592a37d24253a41e5c13834b7872 SHA-1: 57ed55ecc07369f228499e2576cf095bbb4b2ead SHA-256: 4650c13268a4997a168fc7af579ec1ac3df4a52a15a04c3089f6d31a6795493b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is presented as a search result for 'Valtrex over the counter equivalent'. This indicates a phishing or scam attempt. The PDF also contains a large number of external links, many pointing to benign files, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. No scripts were extracted from this sample.

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.me/wix?keyword=valtrex+over+the+counter+equivalent
    • https://39631599-c222-4c48-92c0-6cc8022ca34f.filesusr.com/ugd/9d869b_8e8b9d329bd44b67b4170f0d072a3887.pdf?index=true
    • https://71f5b284-a456-41bd-8b3b-0cca8d3920a3.filesusr.com/ugd/a01749_6eec8d03a899446a84f5d6ae1eb77b55.pdf?index=true
    • https://ec6011d5-e4f2-4349-8b9e-e3abbc0c302c.filesusr.com/ugd/a42eed_99f2e3a8d2f24952882677d13d7729ae.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/29881458096.pdf
    • https://cdn.shopify.com/s/files/1/0469/0273/9106/files/divinity_original_sin_2_source_vampi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/napabotidikavazuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/2236784957.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/wixokimavobosovobivowamef.pdf
    • https://cdn.shopify.com/s/files/1/0454/3823/8878/files/65568824558.pdf
    • https://cdn.shopify.com/s/files/1/0438/3372/0992/files/emc_medication_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2959/files/steel_panthers_world_at_war_generals_edition_download.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_off00006cdd.bin
0abe7771d789caead286878dfa8f39dcf5fa02f6f53b0307f10a94aca667873e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDD 4928 bytes
font_01_sfnt_off00007dac.bin
4f18df18345ce232c726f3ef0dce4fbf85d3de0beaa7c59e030904b9b2316b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAC 10796 bytes

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