Malicious PDF — malware analysis report

Static analysis result for SHA-256 96339b01d48dd50c…

MALICIOUS

PDF

43.1 KB Created: 2020-08-11 14:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b16e8794070ac64b7ee2f81824ecc00 SHA-1: 89737d2bb71dbc0133211a6f8529f1c04a3f8ae4 SHA-256: 96339b01d48dd50c38daa15f7a48f3928fd596453fb71e048d5c95d1df235883
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=equivalent+fractions+year+4+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its role as a lure. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic to distribute the malicious content.

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=equivalent+fractions+year+4+pdf
    • http://files.angelwolfcomics.com/uploads/1/3/0/7/130776131/vafugaxug.pdf
    • http://files.jrtiautotech.com/uploads/1/3/1/6/131607010/xukixujusulev.pdf
    • http://files.modernessencestore.com/uploads/1/3/1/4/131483108/3ea73a.pdf
    • http://files.manaleimedia.com/uploads/1/3/1/3/131384171/1837398.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/ballade_pour_adeline_noten_einfach.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/29251794383.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/68455216378.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/madevapud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1700/files/dizekijetedinaxibejani.pdf
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/40303698003.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/zitobisugosiju.pdf
    • https://cdn.shopify.com/s/files/1/0432/4835/3442/files/xexog.pdf
    • https://cdn.shopify.com/s/files/1/0435/6987/3054/files/valores_morales_ejemplos.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_off000069d1.bin
0aa0e587f283f4f1e2de3d8d4ca663fe4e8697af510fa6b7471602ffbe9653a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D1 5484 bytes
font_01_sfnt_off00007c9b.bin
7dfaccfd98cc591aa048e55f2102f9e8720326b231b484159b1c7bd0cd2b4d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9B 10208 bytes

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