Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5b92d4b740dff1…

MALICIOUS

PDF

40.3 KB Created: 2020-08-12 15:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff2c48e80bef3e73160b041fd255cfc2 SHA-1: 64daea0ea4563f010e1dc19bae8269d2f6da4931 SHA-256: df5b92d4b740dff1d70db2c0039e05abf5e077dcfe9cf21080742bbec6cc72bd
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 of which point to a link farm hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=oceanography+an+invitation+to+marine+science+7th+edition+pdf, is identified as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure by masquerading as a legitimate academic resource. No scripts were extracted from this sample.

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=oceanography+an+invitation+to+marine+science+7th+edition+pdf
    • http://files.christcathedralfayetteville.org/uploads/1/3/0/7/130775528/pexidigi-kobififumip-tinibepagadeb.pdf
    • http://files.haymountrehab.com/uploads/1/3/1/6/131606360/jasiwawe.pdf
    • http://files.familyrootschiro.com/uploads/1/3/0/8/130814717/1605877.pdf
    • http://files.lislhdbooks.com/uploads/1/3/1/6/131636845/23eda46afcf63b.pdf
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/95079136644.pdf
    • https://cdn.shopify.com/s/files/1/0429/9420/4825/files/konusidadisowenu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/amlodipine_mechanism_of_action.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/jikelunobukufiro.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/85768482107.pdf
    • https://cdn.shopify.com/s/files/1/0439/6548/1118/files/geometric_measure_theory.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/19577025450.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/50979020878.pdf
    • https://cdn.shopify.com/s/files/1/0437/5900/9943/files/kent_county_inmate.pdf
    • https://cdn.shopify.com/s/files/1/0441/2217/7688/files/mesidewefifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/gagisusitafaxofu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050d1.bin
3ee02228ac0f2b470c754b5dfc8ae34cd3721abefd6bb9962b3e74c557c344cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50D1 5592 bytes
font_01_sfnt_off000063af.bin
4c03ea2cc9bc2479e730f47d9e75705b69ca293e1932f51f822b12a45de64f0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 9884 bytes
font_02_sfnt_off0000857d.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x857D 4324 bytes

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