Malicious PDF — malware analysis report

Static analysis result for SHA-256 917721f0d8d2f6f2…

MALICIOUS

PDF

47.6 KB Created: 2020-09-01 21:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cc3d98dc94885d6a05c1e5abd3436f17 SHA-1: 3637001b63d5cfb42eb5a9b3e34675ec10fd8312 SHA-256: 917721f0d8d2f6f2259f65982fdc0355c125ba9613e45c6d7a565ac7b4761bfe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links also points to a link farm or redirection strategy.

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.club/wix?keyword=kandh+tapke+babbu+maan+song In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3c386b6eac7244b1864d68e86a4d93ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/58a813_8cf4d2531aa441c8b52833f7333f5573.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/585b1d_72db45ae6e96410586fc016e1c3425c5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e4a001_23a0089ca7934b45ad0723c01e55cb45.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/225520_eaaeba48d8ed4b11a131abbe6ecf765a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cb4a18_612491643e924617a3507370c850646d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_754bab15c0f4436c80791f3e2f1a7b2b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/895bef_f83395425b304d4982883aafa66f7fc5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/88a84f_f315c9942049494c9fb72366189892c9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/097bd5_0a806ad0ba004b07a29144120730152b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9fef6998794846d1a3f7112cc3b3cd04.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_babffb207e8143ed8cd33ab84d595b2a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8b2c09_635d6c615d424747a73a8b61ef4d750d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bdeb4c_170ae314123944019ca51ed86984ea20.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_57a055deee8445489e7134244864cbe1.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DE 5416 bytes
SHA-256: 3e80b067dd480d5137d17686941fe2e9055b2f9c95c8a659392194d91d415149
font_01_sfnt_off00007b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1F 2304 bytes
SHA-256: 92085b0fce0e7e0b893278b0027352ff0902a24475706962660fb63243d55568
font_02_sfnt_off00008543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8543 14052 bytes
SHA-256: a4562cf58499d7a5e44080bd57639e45f0faad42cb89eb0b45aad4043074ff7a

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