Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36c14bdfe3b2e21…

MALICIOUS

PDF

35.2 KB Created: 2020-08-31 01:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 075db8e6b3c555d2767a2c8f800f8746 SHA-1: 630e6877d295d6de949eb2f81675918ed6a25522 SHA-256: a36c14bdfe3b2e219d9195ce409355e821fd50f4b7d4602cc8b2cdfef082b995
150 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.ru/wix?keyword=je+reviens+chez+nous+partition', is identified as a malicious redirector. The presence of a large PDF link farm suggests an attempt to manipulate search engine results or distribute malicious content through a network of linked documents.

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.ru/wix?keyword=je+reviens+chez+nous+partition
    • https://static.usrfiles.com/ugd/6f58fb_7b5b0002bd944c9ca3eea23edffe0c6b.pdf
    • https://static.usrfiles.com/ugd/078c79_48e8a499ed504ce9a7a64957297afe4e.pdf
    • https://static.usrfiles.com/ugd/eaf48f_92223b8a1d3044b698ac676e93999eb7.pdf
    • https://static.usrfiles.com/ugd/8d0191_21ecec1f5a53467892dba9e6f15ec788.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_a72b7581eb3d444b93949dd007575b61.pdf
    • https://static.usrfiles.com/ugd/89064d_926a86ece74944508dbeb5305a6f9e84.pdf
    • https://static.usrfiles.com/ugd/921909_380db4bdabe84629a136da4d4b7f2cfb.pdf
    • https://static.usrfiles.com/ugd/a44510_21968f0b15ae473b9ff59bd41c1c3a41.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/ranidamika.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/33648297715.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/14316313870.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/36206436317.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_off0000479b.bin
4fc611b19f11d23b4b04678162fb4ed605424feeb97b288758f927017540c3cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x479B 5088 bytes
font_01_sfnt_off000058ea.bin
6465d944d02aeed46513b885ff32dc0c1704d598408eec32331db2741ba5e45d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58EA 12108 bytes

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