Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e67c225ebf1564a…

MALICIOUS

PDF

41.0 KB Created: 2020-08-17 12:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6beb104c03bd3bfe87082bd097a0b34a SHA-1: b0ab17744c0fb2ce194a6b042369210a2d833ff5 SHA-256: 5e67c225ebf1564a9b615ed2dd3bcfa584b2bed93c6bde86c3923aad757e5e67
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination and potentially engage in SEO-based link farming. The document body, though heavily obfuscated, contains the same lure text and URLs, suggesting a phishing attempt to trick users into downloading potentially malicious software. The ML classifier strongly supports the malicious nature of this PDF.

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=blade+2+apk+update
    • http://zuxuv.hibsj.org/uploads/1/3/1/0/131070450/19075.pdf
    • http://files.floorsourcing.com/uploads/1/3/0/9/130969703/todagow-lipuvutekalari-fifonir.pdf
    • http://jokepal.dancewithmweyne.org/uploads/1/3/0/8/130874633/2094108.pdf
    • http://files.smuttynosemurders.com/uploads/1/3/2/6/132682119/4942996.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/78557499744.pdf
    • https://cdn.shopify.com/s/files/1/0448/9094/7739/files/vaxepixewi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/89608259274.pdf
    • https://cdn.shopify.com/s/files/1/0434/6377/0274/files/42053659750.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/vumofevisajumomujaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/basic_spanish_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/6572/1503/files/wilasadisomomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3225/6407/files/11632733702.pdf
    • https://cdn.shopify.com/s/files/1/0427/9592/5671/files/56572229427.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/allen_test_series_jee.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/iicrc_s500_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/guxawipunarubijevolu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000630b.bin
3ad0153061bd051b72b911f5a6710ba47434382186a2c0dc792e5f0ea4c02952
pdf-font-stream PDF embedded font (sfnt) at offset 0x630B 4924 bytes
font_01_sfnt_off000073e4.bin
2dfb7b0a15feddfff57640ec1b8613f7f80f9e329fcb9dacfa2e0cc742996a3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E4 10524 bytes