Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76a93e28d85b8b6…

MALICIOUS

PDF

40.0 KB Created: 2020-09-20 13:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0093f1c34f9f2fe6e2dfcea328dd905c SHA-1: a272ac983eef5f27b7f100c08c32564d7f20d268 SHA-256: e76a93e28d85b8b63b0b427c13799d0dd05baebf22073d8ee5c57f5da5bbc8f5
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body, though partially garbled, contains text related to 'National book club day' and the URL 'https://ttraff.cc/wix?keyword=national+book+club+day', suggesting a lure. The presence of a PDF link farm and a critical ML classification further support malicious intent. The primary attack pattern involves redirecting users to malicious infrastructure via a deceptive link.

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.cc/wix?keyword=national+book+club+day
    • http://mitagamur.daisy-acupuncture.com/uploads/1/3/0/9/130969723/7467625.pdf
    • http://files.tasteoftheseaport.org/uploads/1/3/0/7/130740069/jelikatovuzat_winigev.pdf
    • http://guvibi.rachelaukes.com/uploads/1/3/1/6/131637881/kusopitaveletig.pdf
    • http://tijuwuku.artfeedshunger.co/uploads/1/3/1/4/131453109/8139408.pdf
    • http://files.wcsuticklab.com/uploads/1/3/1/6/131637570/fagemos.pdf
    • http://kutikaru.everblossom.com/uploads/1/3/0/8/130813332/4765447.pdf
    • https://cfea1ca8-3f38-480d-8b59-aa9c112743b5.filesusr.com/ugd/c5d40f_84550607d2f64f3e82cdcfeb2b22335e.pdf?index=true
    • https://7b0f32e8-2fcb-49f6-96c1-d5c17d07e86c.filesusr.com/ugd/b6edda_a62f3d53f2ff4834abe5a2937b0f74cb.pdf?index=true
    • https://173428d1-5366-43a5-9b4a-67bcbfdf3364.filesusr.com/ugd/67e251_b630b2401d9b43668d0dc34b1da77e6b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/4964/7270/files/java_8_features.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0552/files/2331686401.pdf
    • https://cdn.shopify.com/s/files/1/0465/0860/5590/files/hipaa_guidelines_when_generating_patient_statements.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/nawusomamutefi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/rasepobopidikutipenekubar.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_off000060d9.bin
7aacdb069b0f4d58761f33bf8b6706ea4942aa0c3af35abcdb37391812b29f23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 4932 bytes
font_01_sfnt_off000071c2.bin
e96b12718020ae6b208ba32d50c6d3d6b6b0bf151043e0756e9d8a0aa162bcd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C2 9952 bytes

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