Malicious PDF — malware analysis report

Static analysis result for SHA-256 a810f928279c768a…

MALICIOUS

PDF

41.9 KB Created: 2020-08-28 04:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f0ef76e1d3aa53370874d67803bff6 SHA-1: 513669159530ddd955e141176ce2f7e779d494da SHA-256: a810f928279c768a09e7e866b82b4b70e81519e8c83f0d582e083f0021f9a5d8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link identified is https://ttraff.me/pify?keyword=idiograma+humano+normal, which is known to lead to malicious infrastructure. The document body itself is largely unreadable binary data, but the presence of the malicious redirector and the heuristic firings strongly suggest a phishing or redirection attempt.

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/pify?keyword=idiograma+humano+normal
    • http://wimute.vireoschoolofperformingarts.com/uploads/1/3/0/7/130739415/3382633.pdf
    • https://cdn.shopify.com/s/files/1/0438/6825/8469/files/8177606278.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/nujuzereza.pdf
    • https://cdn.shopify.com/s/files/1/0437/6854/5442/files/redebuxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/sadikakobofonimasi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5237/files/24590076080.pdf
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/7850808819.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/fefajogunexowiti.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/worakisefutaroxujix.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/14064618998.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1142/files/62768353564.pdf
    • https://cdn.shopify.com/s/files/1/0434/6966/8517/files/93492336668.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gipal.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3392/files/aalavandhan_tamil_full_movie_free.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_off000066a4.bin
60535cb3c0c94802e8952ad863eff9ffacd23c7f0f67a73e671dc3840c928a27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A4 4996 bytes
font_01_sfnt_off00007778.bin
daffd0b80e6554aa6ab30f37cd10f227e7b37a5ea5536e37cc4640c8c6f6207d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7778 10580 bytes

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