Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ae0e80d03ff4fc…

MALICIOUS

PDF

50.4 KB Created: 2020-08-08 03:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d2ef8005c2f430abf57cc4412874686 SHA-1: d82b21f91abf435765097510bf2efc56c704cceb SHA-256: a3ae0e80d03ff4fc1665cbc71dac3337a193f86432f4f5c81c4aa4fad9d4076b
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a phishing or scam attempt where the document is used to drive traffic to a malicious site. The document body itself is heavily obfuscated but contains the malicious 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.com/pify?keyword=marasmus+pathophysiology+pdf
    • http://files.kindred-strategy.com/uploads/1/3/2/8/132815979/4175327.pdf
    • http://files.dongshiart.com/uploads/1/3/0/8/130874090/6820765.pdf
    • http://files.thestrawberryvine.net/uploads/1/3/0/7/130775027/2467738.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/zogoja.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/42367215477.pdf
    • https://cdn.shopify.com/s/files/1/0433/3453/3275/files/bruchrechnen_bungen_mit_lsung.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/ncert_biology_book_12.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1325/files/vezivudedemapabinomupulak.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3091/files/arbol_de_decisiones_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6509/files/90907725696.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/46060411184.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/fusufutakaraxexuruzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/79372067545.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2370/files/wodofubuzeximi.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_off0000873e.bin
219f3f45ddff265d7f4a79747809ff63e4cd943177fb0433cebb7db676be4b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x873E 5560 bytes
font_01_sfnt_off00009a14.bin
7d04ac008fc14f395f0d76a9570397b45daa43c14f9b1044e4c31fd73493394d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A14 10144 bytes

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