Malicious PDF — malware analysis report

Static analysis result for SHA-256 144279581da94d15…

MALICIOUS

PDF

81.9 KB Created: 2020-08-21 16:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 73d7573a5d3901dfa79bf9ab99a21346 SHA-1: 3567bd1af8eba544d0bc2513fcf59947cd1acc14 SHA-256: 144279581da94d15ed676c480de7dd376992e0d1555d6d9cce0ae8aa2ed1baf3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, appears to reference sheet music, suggesting a lure. The presence of embedded URLs and the heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicate the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=riders+on+the+storm+drum+sheet+music In PDF document text
    • http://files.speakbilingual.com/uploads/1/3/1/4/131483154/dajixevoduxuta-dajatasujavanod.pdfIn PDF document text
    • http://files.mercuryonehourcleaners.com/uploads/1/3/0/7/130776268/5775385.pdfIn PDF document text
    • http://files.rebalancewithbianca.com/uploads/1/3/1/4/131454389/litelarapawux-nulujuxuwiwav-zufasatagikarin-balopifonukakan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8366/0441/files/70862302083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/76320163044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/1492933463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/lewizenereta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/lulabonenasositole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/5071191845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0936/6427/files/love_is_an_open_door.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7847/5162/files/95612962839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/secretos_de_la_biblia_ana_catalina_emmerick.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/zixiso.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF0 4344 bytes
SHA-256: 087375385c0c868262579b2b9e08f884f827ceaafe6a3ad743c65a7d49837f40
font_01_sfnt_off0000db43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB43 4944 bytes
SHA-256: 4e22a9396c5e2ef2bf10b816f8f0ae553bb80028120141046f392a4336d98afd
font_02_sfnt_off0000ebe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE6 17208 bytes
SHA-256: fb21f2374e9f29ac7271113a92e91032e887ba4a04363adb07aac286daa972a2
font_03_sfnt_off0001219b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219B 16292 bytes
SHA-256: de07ce9afa4cfbb70b33d35b4faaaa213894c4129b68d650194c2009db6040f3

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