Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ea52b434c89e65…

MALICIOUS

PDF

60.2 KB Created: 2020-07-27 18:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04861efcb88fdfaa755d536d80a60e70 SHA-1: cbb195c1df75c4819a3ea4d8a48fb55c1c67b350 SHA-256: 51ea52b434c89e65992616437ffcd185f0bafeaf03ef9a99b1ae07b903049495
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a large number of external links. One of these links points to 'ttraff.com', which is identified as a known malicious redirector. The document body appears to be obfuscated or corrupted, but the presence of numerous links, including the redirector, suggests a phishing or redirection attack.

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.com/pify?keyword=slow+hip+hop+instrumental+beats+free
    • http://files.leilaamani.com/uploads/1/3/0/7/130775646/9569233.pdf
    • http://files.gilescartwright.co.uk/uploads/1/3/2/6/132683463/015dd5871f88a6.pdf
    • http://files.adobeforfashion.net/uploads/1/3/1/1/131164046/1642196.pdf
    • http://files.funnyjackmusic.com/uploads/1/3/1/3/131398286/8686336.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/83738561323.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/verezolarowivifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/kujatirubelugimiriruxon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/7447970689.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/89426475249.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/luxitoduxekavorel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/78246486583.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/32822955959.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_off0000a0b1.bin
e4195a9ed0591fcfe5e7a12b51ee45b6b0e674f27d4bf0274786c090339fc8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B1 5356 bytes
font_01_sfnt_off0000b2b8.bin
52a4bd807a978aac5b91f327132a73db4617d980edb652826572c868f30716c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B8 15056 bytes

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