Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b841466cca70ade…

MALICIOUS

PDF

43.0 KB Created: 2020-08-16 13:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80de33baf619b10dcc90f027f64875d4 SHA-1: 3a5de74bab8ee9ee0082c2fd8a6a8c88aa18ce3d SHA-256: 6b841466cca70ade948503c8a18ce574543f63b28ab0f7ce3850a9a63a223cb2
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to lead users to harmful content. The ML classifier strongly flagged this PDF as malicious. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to exploit user interest in games to redirect them to malicious sites, likely as part of a phishing or scam campaign.

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.cc/pify?keyword=best+android+high+graphics+games+2019
    • http://buritu.blissfulcounselling.com/uploads/1/3/2/6/132682076/tugojexolabulepar.pdf
    • http://wamif.variety6kitchen.com/uploads/1/3/1/1/131163898/nenanup_rosopefijufozo_xuluzolen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3359516262.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/7575934818.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/77916999144.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/jimevu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1147/2541/files/16149493502.pdf
    • https://cdn.shopify.com/s/files/1/0433/5704/4890/files/fuwabot.pdf
    • https://cdn.shopify.com/s/files/1/0437/6320/4253/files/34943206190.pdf
    • https://cdn.shopify.com/s/files/1/0437/5258/7415/files/27644584280.pdf
    • https://cdn.shopify.com/s/files/1/0431/1026/9085/files/atomic_theory_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/css_flex_overflow_wrap.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3703/files/hubris_and_hamartia.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/65913176529.pdf
    • https://cdn.shopify.com/s/files/1/0431/3851/5098/files/affective_neuroscience_personality_scales.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_off000067e3.bin
c6afa3c3f75e7de58873c931fe5e97445f64d3b1cc594d16809618bd71187321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 5984 bytes
font_01_sfnt_off00007c19.bin
3734e7449111ee55f2efe1f42b07abaadb8ca8f2ad05ef1508b4921213e21166		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C19 10212 bytes

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