Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e964cead132771…

MALICIOUS

PDF

40.9 KB Created: 2020-08-07 14:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad8a45edbbab101cb52b07c9cc5d977 SHA-1: 98fd013fbe48e80623619a35c7db0557290d5631 SHA-256: a3e964cead132771473f1e34c16b235bb26c90fbe10a25616300285aef5d0e9a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a 'blood type food chart PDF'. This link, 'https://ttraff.cc/pify?keyword=a+blood+type+food+chart+pdf', is designed to lure users to malicious infrastructure. The PDF also contains a large number of external links, many pointing to Shopify domains, likely as part of an SEO link farm to obscure the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=a+blood+type+food+chart+pdf
    • http://files.themindfulchristian.com/uploads/1/3/1/1/131163738/3334063.pdf
    • http://files.dennisplott.com/uploads/1/3/1/4/131453365/worozuj.pdf
    • http://files.acomputerconsultant.com/uploads/1/3/1/4/131437728/petove.pdf
    • http://files.bodenflooring.com/uploads/1/3/1/4/131407494/de4ec7e.pdf
    • https://cdn.shopify.com/s/files/1/0432/9930/7673/files/metidi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/osrs_p2p_fishing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/mercer_weighted_grade_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/el_cuaderno_de_noah.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84860081798.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/rebock_cross_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2581582401.pdf
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/how_to_add_people_to_discord_call.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/zozalalon.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/87740143671.pdf
    • https://cdn.shopify.com/s/files/1/0436/5071/1705/files/vumutegijekubakogej.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/kiwuvipemejopel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/alter_ego_plus_b1_corriges.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_off000064b9.bin
53b1de104b9b105dcaedc7dea485927f5a8ea5cc4ccafc614ae044546daa2483
pdf-font-stream PDF embedded font (sfnt) at offset 0x64B9 5296 bytes
font_01_sfnt_off000076ba.bin
7ed50dcb5f90fa64bdc414e1da54a6201eea73912238cd9cd4bdfaa72e9c1f36
pdf-font-stream PDF embedded font (sfnt) at offset 0x76BA 9244 bytes