Malicious PDF — malware analysis report

Static analysis result for SHA-256 6446333ffbef69ba…

MALICIOUS

PDF

59.4 KB Created: 2020-08-10 19:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dda52c1ef9e626c6d04589c48520e8b7 SHA-1: d25c00172a30aa37792cb3f685a8b2d7a9f68148 SHA-256: 6446333ffbef69badd1a85c4d9826b1b4009a48c06522e8d0132bfa333d04581
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector. This suggests the PDF is designed to redirect users to malicious sites, likely for SEO poisoning or phishing, and is not a benign document.

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.ru/pify?keyword=damodarastakam+lyrics+in+telugu+pdf
    • http://files.meghanloweryphd.com/uploads/1/3/1/4/131409463/38f5cb9fdbac6.pdf
    • http://files.akiineventos.com/uploads/1/3/0/7/130739826/15317346c3c.pdf
    • http://files.gallivantinggoddess.com/uploads/1/3/1/4/131452958/busotudusu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/jelejirobimagazumane.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6549/files/44976526714.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0655/files/prelude_bwv_999.pdf
    • https://cdn.shopify.com/s/files/1/0440/8829/5576/files/kemezitawitakowuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4690/3701/files/medagizobujop.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/xesel.pdf
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/jidedifedebo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0445/4576/9636/files/pernyataan_standar_akuntansi_keuangan.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/6th_grade_math_vocabulary_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/44333625345.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000624f.bin
b027b8c3ed2c1855a4aae4e17daf3c432b524d9121ac4a0972dc8653df26afe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 5640 bytes
font_01_sfnt_off00007574.bin
5ed57606c24ae6ce003ac868825de744aee2e1fb3087945cbef5fb3d83157e89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7574 29796 bytes
font_02_sfnt_off0000b4b5.bin
2cc1fcb9913777e4802e067d656b0c57915e997e54eda598e9408704ba35358a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B5 13880 bytes

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