Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9c60ce7ba70443…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 18:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c2ef32ccc3d40cd23818e4d9f282c0d SHA-1: c9cbc311d2e62a972d82aaae90661625033be224 SHA-256: 9e9c60ce7ba7044379ade91707272c8d15f0e1c58e1433bba25c7e703126a788
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, disguised with a search query for 'silent night piano accompaniment sheet music free'. The document body, though heavily obfuscated, appears to contain the same lure text and URLs. The presence of a malicious redirector link and the ML classifier firing strongly indicate a malicious intent to redirect the user to a harmful site.

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=silent+night+piano+accompaniment+sheet+music+free
    • https://cdn.shopify.com/s/files/1/0436/8397/1237/files/84583015389.pdf
    • https://cdn.shopify.com/s/files/1/0440/6142/5814/files/organic_chemistry_reagent_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/3141/9287/files/77373293735.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/76752722972.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/farizupubimadixux.pdf
    • https://static.usrfiles.com/ugd/a31856_d06fbd287218440ab7734606a98dc234.pdf
    • https://static.usrfiles.com/ugd/9e41f0_96d6f80d63ed4372bae7cda8f9c851d3.pdf
    • https://static.usrfiles.com/ugd/de02f3_eabf53a974514f50b68480d4b81f1d7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_35396f3a25dc4e48b77620c942a71c0f.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/sample_of_recommendation_letter_for_university_admission.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/radijilusajeka.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4220/files/cantata_147_de_bach.pdf
    • https://cdn.shopify.com/s/files/1/0462/6726/9277/files/battle_rope_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/sajoruzobawimi.pdf
    • https://static.usrfiles.com/ugd/b8c837_136f5b22e5ed455f9f3d9a3404f5ebc9.pdf
    • https://static.usrfiles.com/ugd/11f207_34dbce154ac24ba3bb71c240b30416b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3735ce45cf8d44ada527c25b3cb95de9.pdf
    • https://static.usrfiles.com/ugd/8d57bd_3aa4f5ef6c6b470696f9d53574b4c7c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_84e7eea281714fa3a1c0a06a05a3401c.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_off00006525.bin
796210ef9c8f077b8966ccab392281c9db85a02fc2e04cd68a316a96305adae7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6525 5532 bytes
font_01_sfnt_off000077ce.bin
c030026baace6c0a4f56ec616047f1ab81524dd80c15a5812a8b78dde810a0aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 10144 bytes