Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e683e18f1d299e…

MALICIOUS

PDF

36.1 KB Created: 2020-08-24 15:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dcd0691af304f5c3369b724449e90eb SHA-1: 3e083af03391ecc45680edff86a5b624440a2478 SHA-256: e5e683e18f1d299efa3f1359636b137c63ee39550bc1698bb09cccd4ba96888b
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=acca+f9+textbook+free'. This URL is presented within the document body as a lure for a free textbook. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious IOC is the ttraff.com redirector.

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=acca+f9+textbook+free
    • http://files.kwdavis.com/uploads/1/3/2/7/132711966/pududar.pdf
    • http://files.sugarrimbar.com/uploads/1/3/1/8/131856430/jijopuxugap.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/raduvonikazur.pdf
    • https://cdn.shopify.com/s/files/1/0445/7309/8143/files/2006_ford_escape_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/aptransco_syllabus_for_eee.pdf
    • https://cdn.shopify.com/s/files/1/0460/2920/9759/files/automation_in_clinical_biochemistry_laboratory.pdf
    • https://cdn.shopify.com/s/files/1/0437/7336/2325/files/uc_browser_java_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6465/6026/files/acls_provider_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/10640419084.pdf
    • https://cdn.shopify.com/s/files/1/0433/8732/2522/files/10049016019.pdf
    • https://cdn.shopify.com/s/files/1/0438/9208/0795/files/atharvana_vedam_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7427/files/13689624714.pdf
    • https://cdn.shopify.com/s/files/1/0435/9100/8418/files/human_rights_watch_world_report_2019_cuba.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_off00004fbe.bin
be6bcf48f2da5f39b9394377b5e1e01132d50477d6060980c389d26ad5924612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FBE 5084 bytes
font_01_sfnt_off00006117.bin
c9e5712f62f1db0b4687be0472f57b9ff56ec4ac34e70cea3b4d2e17eadd8419		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 10280 bytes

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